Case Hardened Blue Gem: Complete Guide to CS2 Blue Gem Patterns

If you spend time in CS2 trading circles, you have heard the term blue gem more than once. A CS2 (CS:GO) blue gem is a Case Hardened skin where the pattern lands mostly blue, and that detail alone can turn a normal weapon into a five-figure collector piece. Case Hardened items use a random pattern seed, so two copies of the same skin can look nothing alike. Because of that randomness, an entire market formed around the blue gem CS2 fans chase. Keep reading and find out what the CS2 (CS:GO) blue gem and its patterns make different. 

What is a CS2 (CS:GO) Blue Gem?

A Blue Gem is a Case Hardened skin where blue covers a large part of the best visible area. That blue can appear on rifles, pistols, SMGs, knives, and some gloves. A CS2 (CS:GO) blue gem does not have value from the name alone, because the pattern seed decides the final look. If the seed places blue on the play side, collectors may have it as a blue gem CS2 item. Since rare seeds have a limited supply, a blue gem pattern can push the skin far above the regular market price.

What Are Case Hardened Patterns in CS2? 

Case Hardened skins are a pattern seed, also called a pattern index, to place blue, gold, purple, and gray across the item. Because the texture shifts with each seed, two skins with the same finish can look very different. A CS2 (CS:GO) skin pattern guide can help you understand this part before you compare prices. A Case Hardened blue gem earns attention when the seed puts heavy blue on the best side, not just a small blue patch on a hidden area.

Understanding Blue Gem Pattern Tiers

Tier 1 – True Blue Gems

Tier 1 patterns have the highest blue percentage on the best visible side. These are collector-grade Blue Gems at the top of the market. Pattern numbers can include AK-47 #661, Karambit #387, and Butterfly Knife #182.

Tier 2 – High Blue Gems

Tier 2 patterns still have strong blue coverage, but they miss perfect placement or full-blue balance. They can include more purple, gold, or gray than Tier 1 skins. Even so, a Counter Strike blue gem from this tier can carry a premium. A Case Hardened pattern sheet helps you compare the seed before you trust the price. Pattern numbers can include AK-47 #168, Karambit #905, and Butterfly Knife #371.

Tier 3 – Mid Blue / Mixed Patterns

Tier 3 patterns balance blue, gold, and purple colors. They can still look valuable, but they have less blue than higher tiers. Pattern numbers can include AK-47 #555, Karambit #262, and Butterfly Knife #798. 

Tier 4 – Low Blue Patterns

Tier 4 patterns have limited blue. They still attract some buyers if the blue lands in a visible spot. This tier can help you start the cheapest blue skin CS2 search because prices may stay closer to normal Case Hardened levels. Pattern numbers can include AK-47 #770, Karambit #25, and Butterfly Knife #34.

Tier 5 – No Blue / Market Patterns

Tier 5 skins have little blue value. They are standard Case Hardened market items, so collectors do not have them as Case Hardened blue gems. Before you pay a premium, compare the seed with a Case Hardened pattern sheet.

Case Hardened Blue Gem Patterns: Firearms

AK-47 Case Hardened (Blue Gem)

• Release Date: August 14, 2013.
• Update: The Arms Deal.
• Weapon Case: CS:GO Weapon Case.
• Steam Price: standard patterns cost $180–$1,100+. Top Tier 1 Blue Gems start at $15,000 to over $1.00 million.

The AK-47 is the most famous blue gem Case Hardened firearm. A Classified-grade rifle skin featuring a metallic, color case-hardened finish. It is characterized by randomized, oil-slick splotches of bright blue, royal purple, and gold across the steel receiver and magazine. Pattern #661 became the main reference point because the top side has heavy blue. Because of that, the AK Case Hardened blue gem patterns guide collector talks. 

AK-47 Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	661, 151, 955, 321, 387, 670, 179
Tier 2	592, 4, 905, 13, 168, 429
Tier 3	555, 442, 978, 139, 828, 969, 750, 695, 103, 112, 733, 844, 228, 868, 434, 698, 74, 996, 760, 375, 708, 823, 690, 791, 278, 917, 463, 711, 849, 92, 82, 450, 512, 310, 713, 11, 721, 236, 172, 950, 147, 782, 322, 363, 189, 961, 497, 430, 887, 426, 862
Tier 4	770, 648, 28, 575, 73, 798, 557, 627, 532, 541, 935, 453, 479, 872, 522, 525, 664, 622, 494, 344, 965, 775, 847, 209, 689, 306, 803, 169, 577, 381, 878, 2, 888, 526, 879, 126, 605, 468, 269, 891, 481, 985, 715, 248, 456, 420, 681, 32, 397, 493, 788, 256, 470, 418, 927, 182, 178, 685, 407, 507, 65, 200, 694, 922, 795, 809, 296, 842, 194, 431, 341, 447, 130, 205, 428, 230, 458, 1000, 242, 34, 325, 724

Five-SeveN Case Hardened (Blue Gem)

• Release Date: November 8, 2013.
• Update: The Arms Deal 2.
• Weapon Case: CS:GO Weapon Case 2.
• Steam Price: standard versions often range from about $10.00 to $480.00+. Tier 1 Blue Gems (#278 or #690) start at $1,500 to $4,500+.

The Five-SeveN gives you a cheaper way to enter the Case Hardened blue gem market. A Restricted-grade pistol skin displaying a chemically induced, Case-Hardened finish. The surface color is applied via case-hardening steel using wood charcoal at extreme temperatures, producing vivid, dynamic stains of yellow, purple, and blue across the slider plate. 

Five-SeveN Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	278, 690, 868, 363, 670, 768
Tier 2	823, 321, 879, 770, 555, 661, 387, 13, 905, 927, 844, 126, 103, 955, 434, 557, 468, 151, 872, 344, 273, 592, 396
Tier 3	325, 381, 888, 532, 795, 724, 632, 187, 526, 685, 689, 902, 828, 791, 935, 628, 112, 577, 809, 428, 168, 497, 179, 447, 174, 430, 180, 429, 627, 512, 426, 985, 14, 262, 887, 648, 948, 61, 969, 862, 849, 922, 4, 874, 215, 456, 189, 413, 383, 715, 750, 414, 700, 333
Tier 4	702, 989, 833, 575, 200, 28, 101, 878, 961, 236, 499, 442, 733, 122, 208, 450, 470, 525, 853, 235, 286, 643, 149, 81, 571, 760, 242, 782, 172, 453, 310, 645, 169, 713, 970, 658, 630, 463, 749, 322, 182, 407, 372, 877, 647, 121, 547, 720, 214, 515, 979, 29, 358, 67, 500, 635, 398, 136, 889, 924, 753, 975, 436, 74, 319, 838, 147, 159, 612, 249, 87, 743, 528, 349, 316, 531, 921, 203, 839, 588, 148, 631, 558, 938, 814, 261, 55, 9, 92, 638, 841, 371, 854, 797, 788, 681, 389, 642, 667, 598, 508, 198, 193, 397, 846, 390, 459, 466, 808, 82, 227, 209, 137, 723, 332, 919, 843, 964, 589

MAC-10 Case Hardened (Blue Gem)

• Release Date: September 21, 2021
• Update: Operation Riptide
• Collection: The 2021 Dust 2 Collection
• Steam Price: standard versions often range from about $20.00 to $115.00+.

The MAC-10 is another lower-cost blue gem CS2 option. The blue gem Mac 10 is a Restricted-tier SMG skin featuring a multi-colored metallic patina finish. It looks like steel that changes color from high heat and charcoal. This process applies randomized, “cookie-cutter” stains of blue, purple, and gold across the weapon receiver while leaving the grip and magazine unpainted.

MAC-10 Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	667, 114, 406, 18, 546, 587, 222, 95, 239, 898, 315
Tier 2	503, 959, 924, 29, 147, 414, 311, 195, 328, 652, 251, 570, 379, 964, 400, 598, 199, 807, 885, 788, 475, 899, 285, 889, 6, 972, 358, 381, 182, 345, 629, 292, 80, 144
Tier 3	34, 831, 808, 346, 41, 295, 811, 208, 309, 644, 436, 933, 108, 464, 657, 58, 72, 705, 960, 528, 858, 376, 378, 561, 19, 119, 553, 944, 241, 801, 153, 76, 523, 501, 313, 566, 349, 871, 458, 214, 525, 880, 699, 602, 669, 369, 138, 748, 402, 390, 434, 835, 579, 633, 720, 111, 127, 604, 473, 156, 107, 658, 457, 8, 242, 10, 190, 707, 573, 185, 716, 502, 735, 117, 453, 255, 399, 751, 881, 424, 403
Tier 4	203, 839, 867, 721, 141, 679, 280, 741, 430, 220, 507, 714, 866, 979, 88, 753, 306, 283, 440, 768, 293, 704, 793, 173, 586, 372, 877, 332, 316, 923, 990, 612, 164, 159, 22, 13, 356, 837, 103, 958, 206, 128, 24, 623, 709, 314, 577, 451, 442, 617, 615, 806, 819, 533, 500, 560, 513, 804, 518, 785, 445, 425, 897, 342, 398, 61, 273, 456, 931, 32, 116, 282, 176, 59, 299, 618, 764, 838, 630, 928, 829, 191, 531, 443, 613, 256, 264, 275, 250, 367, 253, 830, 180, 792, 421, 455, 429, 466, 163, 489, 715, 373, 56, 52, 847, 919, 27, 632, 279, 904, 441, 162, 894, 499, 362, 655, 78, 859, 269, 873, 672, 569, 198, 968, 746, 67, 7, 462, 703, 506, 640, 136, 922, 143, 995, 650, 118, 926, 982, 583, 747, 710, 917, 778, 749, 135, 371, 913

Case Hardened Blue Gem Patterns: Knives

Knives rank at the top of the blue gem Case Hardened market. A blue gem knife has extra appeal because you see the blade often in play. Since rare special items have very low case odds, top blue gem knife examples can reach tens or hundreds of thousands of dollars. That is why they often appear in the most expensive CS2 skin talks. Here are the Case Hardened blue gem pattern knives:

Karambit Knife Case Hardened (Blue Gem)

• Release Date: August 14, 2013.
• Update: The Arms Deal.
• Weapon Case: CS:GO Weapon Case 1, 2, and 3; Operation Bravo Case; Operation Phoenix Case; Operation Vanguard Case; Revolver Case; Winter Offensive Case.
• Steam Price: starts at $800 to $1,800.

The Karambit | Case Hardened is one of the most famous Blue Gem knives in CS2. The Case Hardened finish gives the blade blue, purple, and gold marks based on its pattern seed. If the seed puts a large, clean, blue area on the play side, collectors call it a Blue Gem. Karambit Case Hardened pattern #387 is one of the most famous examples, with private offers over $1,00 million.

Karambit Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	387, 442, 269, 321, 73, 955, 853, 902, 507, 776
Tier 2	905, 698, 670, 130, 375, 664, 828, 74, 282, 453, 868, 377, 891, 798, 341, 541, 713, 661, 494, 4, 182, 823, 273, 838, 917, 82, 721, 510, 809, 470, 179
Tier 3	262, 322, 30, 256, 139, 782, 989, 888, 11, 844, 92, 919, 112, 770, 330, 463, 306, 34, 429, 965, 811, 522, 803, 20, 575, 638, 914, 580, 236, 310, 916, 515, 631, 407, 371, 841, 555, 711, 632, 398, 598, 420, 283, 856, 202
Tier 4	25, 38, 335, 694, 424, 852, 849, 152, 727, 468, 106, 265, 194, 961, 138, 708, 942, 323, 325, 652, 749, 622, 334, 187, 974, 615, 405, 499, 432, 450, 643, 800, 381, 509, 426, 244, 935, 793, 913, 185, 945, 116, 434, 695, 151, 32, 177, 103, 588, 797, 401, 879, 839, 28, 497, 690, 363, 689, 875, 278, 775, 418, 259, 284, 595, 490, 286, 928, 985, 655, 953, 791

M9 Bayonet Knife Case Hardened (Blue Gem)

• Release Date: August 14, 2013.
• Update: The Arms Deal.
• Weapon Case: CS:GO Weapon Case 1, 2, and 3; Operation Bravo Case; Operation Phoenix Case; Operation Vanguard Case; Revolver Case; Winter Offensive Case.
• Steam Price: starts at $750 to $1,500.

The M9 Bayonet has a large blade, so blue coverage looks clear in the in-game view. A Case Hardened blue gem M9 gains value when the play side has deep blue. Pattern #601 is the main M9 Blue Gem seed, with about 92% blue on the blade and prices that can pass $65,000. The model can cost less than a Karambit, but top patterns still belong to high-end collectors. Use compare CS2 skin prices before you trust a premium.

M9 Bayonet Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	601, 417
Tier 2	58, 503, 523, 406, 349, 403
Tier 3	239, 107, 150, 897, 837, 715, 345, 224, 346, 281, 915, 430, 610, 202, 698, 585, 750, 59, 449, 959, 113
Tier 4	533, 336, 41, 210, 355, 177, 679, 243, 634, 887, 628, 288, 400, 859, 681, 867, 550, 880, 169, 525, 759, 904, 613, 546, 811, 269, 564, 293, 924, 475, 117, 885, 835, 393, 4, 88, 351, 229, 447, 157, 955, 556, 735, 204, 315, 166, 138, 356, 675, 91, 67, 156, 954, 968, 821, 553, 286, 783, 170, 328, 445, 808, 570, 933, 878, 946, 441, 588, 496, 632, 866, 187, 167, 871, 969, 103, 794, 646, 366, 176, 108, 295, 493, 372, 64, 529, 262, 124

Butterfly Knife Case Hardened (Blue Gem) 

• Release Date: July 1, 2014.
• Update: Operation Breakout
• Weapon Case: Operation Breakout Weapon Case.
• Steam Price: starts at $1,300 to $2,400.

A blue gem Butterfly Knife has extra demand because the model already has a loyal fan base. When rare blue covers the blade, the price can jump far above the normal market price. Pattern #182 is usually listed as the best Butterfly Knife Blue Gem seed, with around 79.6% blue coverage. Many blue gem CS2 buyers compare the seed with a Case Hardened pattern sheet first. 

Butterfly Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	182, 652, 398, 838, 29, 494
Tier 2	371, 881, 721, 638, 283, 330, 868, 891, 917, 749, 839, 214, 147, 919, 73
Tier 3	798, 358, 664, 424, 618, 458, 928, 858, 130, 112, 629, 782, 902, 809, 713, 306, 720, 964, 457, 702, 510, 407, 92, 965, 924, 913, 694, 61, 776, 853, 74, 522, 256, 488, 703, 194, 248, 499, 108, 282, 411, 811, 803, 335
Tier 4	34, 770, 768, 72, 27, 453, 885, 788, 699, 989, 547, 528, 631, 208, 414, 445, 808, 332, 612, 466, 598, 630, 322, 375, 880, 38, 893, 916, 842, 741, 841, 898, 269, 854, 846, 273, 18, 575, 717, 905, 255, 844, 464, 823, 262, 658, 30, 191, 341, 377, 43, 10, 188, 420, 401, 513, 56, 671, 153, 642, 507, 116, 633, 884, 139, 505, 515, 67, 11, 42, 311, 976, 321, 426, 907, 801, 98, 111, 901, 442, 826, 236, 906, 927, 799, 974

Skeleton Knife Case Hardened (Blue Gem)

• Release Date: November 18, 2019.
• Update: Operation Shattered Web.
• Weapon Case: Shattered Web Case and Fracture Case.
• Steam Price: starts from $225.00 to $875.00.

A Skeleton Knife blue gem has a newer feel than classic Arms Deal knives. The open handle puts more focus on the blade, so a strong seed can carry the look. Pattern #403 is one of the top Skeleton Knife Blue Gem seeds, with about 86% blue coverage. A Skeleton Knife blue gem and high play-side blue can attract modern knife fans, and Skeleton Knife blue gem tiers keep demand active.

Skeleton Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	403, 456, 169, 681, 316, 577, 58
Tier 2	704, 55, 281, 922, 668, 449, 556, 351, 447, 583, 262, 180, 880, 210, 345, 850
Tier 3	634, 601, 496, 170, 915, 585, 916, 67, 628, 383, 239, 698, 372, 533, 336, 588, 442, 202, 837, 166, 116, 700, 954, 187, 797, 429, 632, 529, 516, 157, 547, 14, 294, 103, 525, 624, 503
Tier 4	269, 393, 288, 430, 374, 669, 507, 887, 179, 828, 867, 812, 162, 959, 941, 10, 853, 387, 820, 299, 640, 818, 902, 776, 606, 417, 872, 91, 680, 955, 537, 286, 176, 693, 107, 899, 13, 203, 719, 151, 88, 879, 821, 519, 298, 222, 349, 212, 227, 715, 750, 325, 84, 805, 504, 235, 807, 241, 740, 878, 619, 292, 910, 689, 675, 334, 866, 651

Talon Knife Case Hardened (Blue Gem)

• Release Date: August 1, 2018.
• Update: A New Horizon.
• Weapon Case: Horizon Case and Danger Zone Case.
• Steam Price: starts from $500 to $1,100.

The Talon Knife has a curved blade close to the Karambit family. A CS2 (CS:GO) blue gem Talon can cost far above a normal Case Hardened Talon when the visible side has strong blue. Seed #55 is usually the best Talon Blue Gem, with about 96.1% Blue Gem coverage. 

Talon Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	55, 923, 241, 602, 899, 316, 180, 222, 528, 10, 837
Tier 2	185, 3, 14, 80, 114, 351, 866, 311, 176, 170, 199, 805, 819, 299, 357, 56, 609, 501, 707, 468, 657, 379, 365, 345, 583, 283, 807, 506, 576, 116, 570
Tier 3	873, 95, 203, 891, 367, 19, 533, 941, 693, 473, 374, 658, 18, 111, 976, 130, 137, 291, 516, 456, 621, 186, 505, 669, 660, 883, 599, 328, 749, 488, 491, 815, 761, 798, 960, 58, 46, 830
Tier 4	618, 917, 481, 292, 881, 598, 547, 633, 76, 496, 838, 557, 730, 890, 347, 411, 933, 72, 77, 959, 313, 507, 88, 115, 70, 497, 188, 381, 191, 606, 168, 293, 577, 255, 704, 668, 342, 404, 458, 820, 431, 607, 504, 702, 403, 640, 503, 391, 138, 447, 446, 835, 383, 59, 67, 372, 280, 248, 821, 100, 956, 218, 75, 681, 927, 729, 780, 157

Bayonet Knife Case Hardened (Blue Gem)

• Release Date: August 14, 2013.
• Update: The Arms Deal.
• Weapon Case: CS:GO Weapon Case 1, 2, and 3; Operation Bravo Case; Operation Phoenix Case; Operation Vanguard Case; Revolver Case; Winter Offensive Case.
• Steam Price: starts at $550 to $1,000.

On the Bayonet | Case Hardened, even a small shift in the pattern seed can make the blue look much stronger across the blade. Seed #555 is the main Bayonet Blue Gem pattern, with about 83.74% blue coverage. The blue gem Bayonet has a long blade, so the blue coverage can look very clear. 

Bayonet Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	555, 592, 670, 151, 179
Tier 2	695, 955, 321, 661, 228, 969, 828, 168, 209, 387
Tier 3	760, 868, 905, 844, 750, 103, 325, 922, 137, 996, 617, 512, 363, 13, 823, 733, 532, 678, 894, 82, 791, 202, 797, 790, 887, 493, 4, 112, 537, 710, 872, 430, 281, 715
Tier 4	429, 526, 169, 259, 888, 479, 632, 189, 879, 689, 602, 770, 28, 624, 227, 360, 759, 352, 481, 577, 681, 690, 850, 434, 324, 456, 278, 869, 349, 235, 628, 207, 355, 226, 557, 2, 310, 880, 878, 497, 450, 847, 704, 462, 961, 443, 950, 126, 523, 935, 575, 849, 978, 641, 74, 627, 775, 426, 968, 648, 344, 381, 795, 685, 768, 927, 807, 874, 862, 172, 403, 290, 782, 442, 139, 599, 81, 65, 428, 525, 147, 698, 895, 236, 956, 243, 468, 892, 94, 724, 396, 948, 108, 985, 277, 520, 200, 288, 180, 467, 187, 296, 622, 447, 306, 397, 149, 14, 286, 604, 463, 492, 708, 101, 178, 645, 124, 322, 261, 237, 702, 92, 241, 389, 679, 225, 48, 788, 333, 721, 215, 713, 814, 970, 93, 923, 588, 519, 669, 265, 410, 453

Flip Knife Case Hardened (Blue Gem) 

• Release Date: August 14, 2013.
• Update: The Arms Deal.
• Weapon Case: CS:GO Weapon Case 1, 2, and 3; Operation Bravo Case; Operation Phoenix Case; Operation Vanguard Case; Revolver Case; Winter Offensive Case.
• Steam Price: starts at $350 to $650+.

The Flip Knife offers a classic Case Hardened Blue Gem option without the same price pressure as Karambit or Butterfly Knife patterns. Its blade is smaller, but the play side still has enough space for strong blue coverage. Seed #670 is usually treated as the main Flip Knife Blue Gem, with more than 95% play-side blue. 

Flip Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	670, 321, 151, 592, 661, 555
Tier 2	828, 955, 179, 387, 844, 168, 868, 363, 969, 750, 823, 103, 760
Tier 3	996, 791, 905, 169, 695, 532, 577, 879, 770, 733, 715, 209, 872, 526, 456, 13, 681, 430, 189, 112, 887, 689, 28, 628, 228, 137, 878, 922, 4, 768, 479, 961, 690, 278, 429, 325
Tier 4	557, 426, 935, 892, 349, 575, 704, 648, 888, 724, 147, 481, 403, 450, 850, 775, 281, 82, 428, 396, 497, 795, 126, 2, 525, 344, 985, 81, 512, 468, 381, 74, 434, 849, 862, 847, 809, 310, 698, 447, 927, 65, 790, 948, 685, 453, 200, 978, 236, 970, 894, 306, 235, 645, 950, 172, 139, 519, 202, 333, 14, 149, 782, 814, 227, 463, 617, 9, 397, 389, 92, 178, 442, 493, 470, 708, 215, 261, 627, 443, 622, 564, 122, 34, 286, 187, 806, 843, 242, 48, 558, 788, 322

Kukri Knife Case Hardened (Blue Gem)

• Release Date: February 6, 2024.
• Update: A Call to Arms.
• Weapon Case: Kilowatt Case.
• Steam Price: starts at $380 to $850+.

The Kukri is one of the newest Case Hardened knives in CS2, so its Blue Gem market still feels fresh. Its wide, curved blade creates blue patterns, and that makes strong seeds easier to notice in the play view. Seed #494 is the key Kukri Blue Gem pattern, with about 93% blue on the front side. 

Kukri Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	494, 770, 575, 652, 618, 917, 844, 112, 891, 838, 868
Tier 2	283, 130, 721, 468, 330, 510, 798, 702, 841, 664, 629, 371, 182, 38, 881, 631, 638, 61
Tier 3	985, 811, 808, 989, 488, 334, 823, 643, 426, 282, 73, 694, 547, 916, 858, 749, 854, 630, 499, 375, 256, 442, 961, 116, 919, 306, 902, 335, 853, 522, 776, 411, 92, 809, 262, 612, 885, 505, 398, 528, 194, 576, 248, 711, 883, 768, 708, 34, 414, 347, 657, 14, 713, 74, 698, 453, 273, 29, 788
Tier 4	803, 89, 188, 782, 457, 497, 269, 322, 964, 965, 175, 176, 321, 236, 108, 515, 98, 658, 56, 905, 470, 907, 310, 556, 214, 860, 20, 27, 622, 445, 976, 134, 72, 927, 875, 4, 387, 616, 852, 429, 828, 177, 341, 753, 557, 147, 458, 507, 311, 849, 816, 953, 633, 153, 800, 955, 109, 866, 191, 899, 541, 888, 609, 42, 846, 924, 935, 106, 598, 263, 55, 509, 914, 682, 25, 775, 637, 670, 358, 958, 741, 942, 57, 243, 381, 138, 245, 642, 397, 820, 801, 513, 208, 542, 780, 563, 596, 179, 80, 377, 11, 395

Stiletto Knife Case Hardened (Blue Gem)

• Release Date: August 1, 2018.
• Update: A New Horizon.
• Weapon Case: Horizon Case and Danger Zone Case.
• Steam Price: starts at $400 to $900+.

The Stiletto Knife has a slim blade, so the blue has to land in the right spot. Seed #182 is one of the best Stiletto Blue Gem patterns because the main side shows heavy blue. A CS2 (CS:GO) blue gem Stiletto can look premium when the player’s side has a clear blue strip. 

Stiletto Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	182, 713, 494
Tier 2	74, 917, 407, 868, 92, 453, 322, 112, 798, 965, 398, 721, 139, 891, 838, 321, 905, 664
Tier 3	371, 522, 803, 387, 269, 638, 749, 214, 147, 420, 73, 463, 256, 809, 29, 510, 782, 442, 928, 283, 130, 375, 853, 964, 273, 839, 208, 242, 335, 244, 776, 330, 788, 507, 11, 919, 82, 282, 470, 358, 332, 341, 670, 694, 194, 248, 811, 913, 842, 770, 632, 720, 278, 846
Tier 4	661, 690, 902, 881, 541, 955, 655, 773, 306, 652, 401, 698, 34, 978, 598, 885, 823, 695, 4, 466, 612, 30, 888, 67, 515, 727, 499, 377, 849, 418, 575, 800, 989, 426, 32, 547, 630, 622, 717, 877, 631, 72, 711, 555, 179, 974, 767, 450, 768, 914, 942, 414, 856, 924, 889, 236, 136, 797, 151, 405, 429, 975, 808, 27, 458, 61, 310, 411, 799, 424, 884, 265, 775, 254, 228, 38, 950, 648, 13, 216, 844, 172, 642, 42, 841, 138, 658, 205, 497, 858, 592, 323, 262, 230, 457, 708, 517, 793

Survival Knife Case Hardened (Blue Gem)

• Release Date: November 18, 2019.
• Update: Operation Shattered Web.
• Weapon Case: Shattered Web Case and Fracture Case.
• Steam Price: starts at $200.00 to $430.00+.

A Survival knife Case Hardened blue gem can offer a lower-cost path into rare blue knife patterns. The blade has enough width to display blue clearly, and strong seeds can lift the value above normal prices. Seed #169 is one of the strongest Survival Knife Blue Gem seeds, with about 89.45% Blue Gem coverage. 

Survival Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	403, 456, 169, 681, 316, 577, 281, 704, 58
Tier 2	922, 55, 449, 668, 634, 351, 601, 585, 583, 447, 210, 850, 628, 880, 556, 180
Tier 3	170, 372, 166, 915, 797, 202, 632, 496, 533, 262, 67, 336, 588, 187, 345, 239, 837, 624, 103, 383, 529, 700, 698, 157, 179, 288, 430, 887, 393, 429, 954, 916, 349, 812, 867, 286, 162, 387, 872, 516
Tier 4	442, 828, 955, 537, 669, 818, 14, 417, 941, 750, 116, 503, 715, 525, 374, 151, 606, 294, 10, 107, 719, 959, 235, 227, 619, 680, 519, 325, 507, 689, 91, 88, 269, 203, 899, 879, 807, 292, 176, 299, 547, 610, 820, 108, 504, 869, 523, 821, 693, 675, 222, 298, 640, 710, 532, 969, 878, 363, 760, 526, 866, 84, 806, 261, 665, 613, 790, 805, 794, 902, 560, 428, 973, 651, 212, 168, 641, 789, 670, 740, 910, 241, 137, 124, 386

Ursus Knife Case Hardened (Blue Gem)

• Release Date: August 1, 2018.
• Update: A New Horizon.
• Weapon Case: Horizon Case and Danger Zone Case.
• Steam Price: often starts at $250 to $500+.

The Ursus Knife has a simple blade shape, so pattern placement is easy to judge. A blue gem CS2 Ursus can look strong if the blade face has a broad blue patch. Since it often costs less than premium knives, it may suit value-focused buyers. Compare seed, wear, and recent sales.

Ursus Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	494, 770, 618, 575, 652, 112
Tier 2	891, 838, 283, 917, 130, 844, 702, 721, 868, 881, 468, 510, 798, 371, 330, 629
Tier 3	638, 664, 488, 858, 576, 61, 841, 248, 38, 631, 182, 749, 643, 808, 811, 528, 854, 961, 73, 505, 334, 306, 989, 823, 630, 116, 56, 426, 916, 612, 985, 411, 547, 375, 883, 657, 282, 14, 694, 188, 442, 919, 658, 902, 776, 522, 108, 853, 347, 414, 497, 256
Tier 4	176, 29, 398, 458, 788, 499, 768, 976, 262, 311, 92, 72, 445, 711, 633, 698, 899, 34, 964, 335, 809, 453, 708, 194, 609, 803, 273, 27, 927, 713, 74, 885, 236, 10, 866, 321, 269, 89, 780, 322, 175, 965, 905, 55, 707, 98, 191, 782, 457, 801, 429, 907, 556, 387, 147, 4, 255, 741, 80, 622, 470, 310, 849, 955, 358, 753, 828, 507, 365, 958, 381, 214, 341, 830, 515, 846, 357, 20, 222, 860, 541, 513, 318, 299, 245, 933, 428

Nomad Knife Case Hardened (Blue Gem)

• Release Date: November 18, 2019.
• Update: Operation Shattered Web.
• Weapon Case: Shattered Web Case and Fracture Case.
• Steam Price: starts at $320 to $700+.

The Nomad Knife has a rugged shape, and Case Hardened colors fit it well. A CS2 (CS:GO) blue gem Nomad can gain value if blue lands across the main blade face. Since prices shift by wear and seed, inspect links should guide your decision before any trade.

Nomad Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	456, 577, 169, 681, 55, 403, 922, 704, 316, 850, 628, 187, 447
Tier 2	281, 210, 700, 180, 588, 262, 13, 336, 880, 668, 383, 429, 698, 797, 14, 496, 634, 351, 166, 556, 529, 916, 442, 872, 583
Tier 3	103, 632, 585, 624, 170, 525, 372, 58, 387, 345, 286, 955, 10, 179, 828, 151, 294, 915, 879, 853, 449, 902, 533, 202, 393, 640, 818, 935, 363, 67, 954, 750, 168, 648, 516, 719, 558, 776, 239, 235, 325, 887, 547, 227, 723, 212, 91
Tier 4	886, 519, 162, 823, 795, 702, 126, 557, 940, 428, 298, 635, 680, 740, 502, 261, 430, 334, 760, 665, 768, 349, 129, 693, 369, 144, 374, 213, 689, 417, 589, 241, 571, 973, 715, 189, 310, 867, 844, 321, 649, 820, 670, 386, 651, 619, 938, 606, 941, 849, 636, 537, 910, 669, 601, 617, 278, 236, 592, 690, 116, 560, 806, 504, 107, 81, 878, 791, 532, 312, 564, 121, 731, 450, 641, 63, 969, 821, 203, 754, 84, 812, 288, 729, 526

Paracord Knife Case Hardened (Blue Gem)

• Release Date: November 18, 2019.
• Update: Operation Shattered Web.
• Weapon Case: Shattered Web Case and Fracture Case.
• Steam Price: often starts at $220 to $450+.

The Paracord Knife can be a practical blue gem knife choice for tighter budgets and the cheapest blue skin CS2 search. Its blade has space for blue patches, but top patterns still need careful seed checks. A blue gem Case Hardened Paracord may not have Karambit-level demand, yet the right pattern can still add a premium.

Paracord Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	403, 316, 456, 58, 681, 577, 169
Tier 2	922, 704, 601, 281, 345, 583, 180, 55, 449, 585, 634, 351, 239, 668, 447
Tier 3	837, 210, 880, 430, 915, 887, 628, 850, 556, 383, 372, 503, 170, 349, 202, 525, 496, 262, 67, 116, 269, 288, 336, 533, 632, 588, 959, 797, 529, 187, 176, 374, 417, 954, 88, 157, 916, 507, 166, 669, 103, 812, 899
Tier 4	429, 442, 537, 700, 624, 222, 162, 698, 867, 393, 523, 715, 294, 179, 14, 866, 516, 606, 818, 95, 807, 610, 299, 59, 828, 613, 794, 286, 941, 519, 107, 872, 203, 151, 227, 292, 387, 719, 325, 821, 750, 91, 235, 10, 805, 400, 955, 859, 995, 138, 680, 501, 462, 902, 923, 528, 689, 675, 212, 547, 546, 315, 84, 619, 693, 879, 956, 504, 820, 298, 640, 311, 108, 740, 3, 806, 600

Huntsman Knife Case Hardened (Blue Gem)

• Release Date: May 1, 2014.
• Update: The Hunt Begins.
• Weapon Case: Huntsman Weapon Case.
• Steam Price: often ranges from $280 to $550+.

The Huntsman Knife has a wide blade, so the Huntsman knife Case Hardened patterns are easy to compare. High-blue seeds look strong because the blade gives the pattern enough space. Since Huntsman prices can rank below premium knives, this model can help you chase a blue gem knife with a lower budget. 

Huntsman Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	618, 652, 721, 29
Tier 2	770, 494, 702, 838, 881, 505, 891, 306, 638, 798, 248, 576, 283, 112, 371, 917, 130, 575
Tier 3	56, 73, 707, 868, 919, 108, 72, 844, 182, 497, 428, 458, 153, 629, 255, 741, 927, 703, 147, 609, 858, 749, 330, 488, 510, 34, 839, 867, 631, 61
Tier 4	557, 379, 671, 464, 528, 424, 854, 502, 398, 426, 780, 699, 664, 468, 630, 38, 782, 587, 841, 188, 222, 612, 8, 823, 976, 547, 116, 411, 657, 643, 788, 898, 95, 808, 10, 989, 916, 811, 367, 282, 633, 761, 902, 414, 92, 358, 776, 830, 694, 809, 853, 114, 899, 311, 768, 964, 334, 376, 658, 883, 806, 18, 27, 704, 280, 499, 553, 961, 522, 156, 335, 262, 445, 457, 716, 965

Classic Knife Case Hardened (Blue Gem) 

• Release Date: October 18, 2019.
• Update: CS20 Case Skins
• Weapon Case: CS20 Case.
• Steam Price: often ranges from $350 to $750+.

The Classic Knife connects CS2 skins to old Counter-Strike roots. A Case Hardened blue gem Classic can feel nostalgic and rare at the same time. Since it appears in the CS20 Case, the supply differs from the original Arms Deal knives. 

Classic Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	403, 58, 681, 169, 456, 601, 316, 577
Tier 2	704, 449, 281, 585, 922, 634, 55, 210, 351
Tier 3	837, 915, 880, 556, 628, 345, 850, 202, 583, 288, 668, 239, 447, 372, 67, 170, 336, 417, 349, 632, 496, 533, 107, 529, 887, 262, 503, 393, 162, 430, 269, 954, 383, 166, 797, 867, 180, 374, 157, 588, 537, 116, 916, 624, 715, 103, 187
Tier 4	959, 523, 176, 812, 669, 88, 507, 525, 286, 429, 700, 179, 698, 442, 899, 222, 91, 818, 941, 613, 866, 675, 606, 108, 325, 750, 610, 828, 955, 519, 294, 516, 235, 794, 821, 227, 619, 151, 693, 710, 299, 600, 807, 387, 59, 869, 95, 719, 292, 400, 805, 203, 689, 995, 665, 14, 973, 298, 526, 547, 462, 84, 504, 551, 124, 859, 878, 646, 138, 806, 564, 680, 315, 872, 3, 528, 902, 790, 820, 546, 969, 740, 651, 212, 910

Bowie Knife Case Hardened (Blue Gem) 

• Release Date: February 17, 2016.
• Update: Operation Wildfire.
• Weapon Case: Operation Wildfire Case.
• Steam Price: often ranges from $240 to $500+.

The Bowie Knife has one of the largest blade surfaces in CS2. Because of that, blue coverage can look huge on the right seed. Some Bowie patterns can have very high blue, so buyers still check them closely. 

Bowie Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	182, 398
Tier 2	652, 29, 838, 371, 358, 638, 214
Tier 3	839, 720, 283, 282, 749, 147, 858, 330, 407, 629, 928, 713, 964, 919, 208, 74, 917, 868, 335, 782, 768, 499, 902, 965, 721, 256, 989, 891, 598, 457, 494, 885, 913
Tier 4	67, 880, 453, 881, 273, 788, 630, 811, 34, 61, 853, 924, 515, 414, 464, 798, 632, 73, 322, 846, 664, 776, 108, 612, 92, 332, 547, 30, 401, 655, 38, 898, 877, 797, 699, 269, 424, 809, 808, 658, 466, 889, 377, 18, 841, 341, 27, 975, 507, 801, 510, 306, 694, 242, 604, 522, 753, 411, 194, 265, 10, 139, 714, 378, 445, 916, 773, 43, 309, 705, 528, 136, 144, 153, 420, 130, 321, 618, 513, 72, 191

Falchion Knife Case Hardened (Blue Gem)

• Release Date: May 26, 2015.
• Update: Operation Bloodhound.
• Weapon Case: Falchion Case.
• Steam Price: often ranges from $190 to $380+.

The Falchion Knife has a unique blade shape and inspect animation, so a strong blue seed can look very noticeable in CS2. A blue gem CS2 Falchion can gain value when blue takes over the play side. Seed #494 is usually the top Falchion Blue Gem, with about 93% blue on the play side and about 90% on the back side.

Falchion Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	494, 838, 638, 891, 371, 917, 868, 283, 112, 398, 130, 182, 749
Tier 2	330, 721, 770, 798, 919, 664, 652, 575, 881, 694, 522, 38, 214, 194, 885, 964, 989, 902, 841, 73, 547, 282, 630, 631, 809, 510, 488, 61, 803, 116, 335
Tier 3	713, 823, 811, 256, 92, 74, 965, 499, 768, 854, 808, 407, 853, 916, 776, 844, 858, 453, 29, 411, 426, 618, 375, 913, 262, 42, 924, 273, 893, 839, 717, 598, 642, 928, 702, 322, 334, 414, 528, 846, 269, 905
Tier 4	89, 176, 629, 377, 30, 612, 442, 341, 27, 332, 98, 974, 321, 515, 139, 782, 20, 458, 743, 243, 643, 457, 596, 907, 507, 244, 248, 883, 852, 800, 505, 11, 208, 711, 387, 34, 67, 541, 753, 655, 470, 420, 175, 826, 254, 358, 767, 445, 967, 816, 466, 152, 188, 483, 396, 658, 265, 698, 401, 478, 942, 975, 632, 595, 263, 191, 799, 687, 106, 622, 500, 405, 682, 306, 888, 82, 432, 43, 72, 958, 615, 177, 985, 708, 556, 580, 424, 534, 945, 245, 347, 310, 706, 914, 284, 720, 866, 513, 468, 299, 148, 788, 339, 400

Gut Knife Case Hardened (Blue Gem)

• Release Date: August 14, 2013.
• Update: The Arms Deal.
• Weapon Case: CS:GO Weapon Case 1, 2, and 3; Operation Bravo Case; Operation Phoenix Case; Operation Vanguard Case; Revolver Case; Winter Offensive Case.
• Steam Price: often ranges from $160 to $300+.

The Gut Knife is one of the oldest Case Hardened knife options. Its hook blade can display blue in a unique way, although demand often trails higher-status knives. A CS2 (CS:GO) blue gem Gut Knife can still appeal to collectors if the pattern is well placed.

Gut Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	567, 962, 125, 60
Tier 2	165, 799, 140, 171, 591, 215, 977, 723, 997, 644, 870, 724, 232, 939, 384, 756, 974
Tier 3	50, 40, 730, 350, 477, 729, 218, 971, 836, 86, 691, 552, 540, 388, 662, 175, 785, 953, 66, 245, 806
Tier 4	81, 766, 294, 832, 466, 272, 193, 167, 920, 286, 420, 890, 875, 619, 826, 92, 435, 342, 647, 759, 965, 998, 426, 37, 539, 829, 417, 53, 979, 525, 9, 808, 743, 906, 584, 514, 476, 213, 45

Shadow Daggers Case Hardened (Blue Gem) 

• Release Date: September 17, 2015.
• Update: Shadow Boxing.
• Weapon Case: Shadow Case.
• Steam Price: often ranges from $150 to $280+

Shadow Daggers give you two small blades, so the pattern needs to work across both sides. A Case Hardened blue gem pair can look rare if both daggers have visible blue on them. Since Shadow Daggers often cost less than many knives, they can fit a lower budget. 

Shadow Daggers Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	56, 505, 866, 417, 609
Tier 2	657, 176, 830, 771, 576, 707
Tier 3	602
Tier 4	570, 367, 706, 346, 933

Navaja Knife Case Hardened (Blue Gem)

• Release Date: August 1, 2018.
• Update: A New Horizon.
• Weapon Case: Horizon Case and Danger Zone Case.
• Steam Price: often ranges from $120 to $220+.

The last knife on our list is the Navaja Knife, which is one of the cheaper Case Hardened knife models. A blue gem Case Hardened Navaja can help you test the Blue Gem market before you move to expensive blades. Because the blade is smaller, a strong blue needs a good seed and a clear view for inspection.

Navaja Knife Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	398, 407, 838, 371, 182, 839, 638, 720, 74, 273, 749, 919, 713, 401
Tier 2	877, 913, 332, 598, 453, 283, 928, 632, 139, 965, 773, 282, 902, 321, 515, 420, 975, 891, 322, 335, 989, 30, 424, 797, 809, 811, 463, 782, 798, 635, 358, 917
Tier 3	73, 67, 889, 507, 793, 664, 387, 269, 776, 846, 92, 853, 256, 377, 522, 214, 330, 847, 905, 510, 136, 727, 341, 185, 194, 694, 868, 630, 655, 642, 29, 418, 494, 942, 974, 265, 499, 884, 466, 615, 808, 284, 490, 460
Tier 4	470, 826, 885, 82, 112, 803, 405, 594, 841, 547, 670, 768, 202, 20, 881, 432, 799, 823, 595, 612, 254, 259, 38, 68, 661, 717, 767, 11, 152, 541, 208, 721, 86, 924, 901, 865, 198, 945, 936, 916, 964, 979, 631, 130, 888, 400, 375, 308, 244, 714, 315, 4, 21, 658, 958, 458, 61, 249, 442, 216, 580, 352, 967, 42

Case Hardened Blue Gem Patterns: Gloves

Hydra Gloves Case Hardened (Blue Gem)

• Release Date: February 14, 2018
• Update: Welcome to the Clutch
• Weapon Case: Clutch Case, Revolution Case
• Steam Price: starts at $95.00 to $650.00.

Hydra Gloves | Case Hardened can become Blue Gem gloves when the pattern seed places strong blue patches across the main hand panels and the knuckle area. Seeds #310, #829, #221, #399, and #505 are often listed among the best Hydra Gloves Blue Gem patterns. 

Hydra Gloves Blue Gem pattern numbers

Group	Pattern Seeds
Tier 1	71, 221, 310, 392, 399, 505, 632, 773, 829, 900, 941
Tier 2	9, 28, 31, 55, 113, 119, 187, 195, 232, 254, 282, 297, 308, 341, 366, 369, 393, 442, 476, 500, 562, 569, 575, 617, 698, 701, 703, 708, 708, 760, 779, 780, 791, 814, 818, 837, 872, 880, 881, 882, 898, 905, 916, 931, 932, 944, 974, 975
Tier 3	13, 25, 45, 143, 184, 185, 213, 240, 319, 348, 358, 361, 394, 398, 401, 410, 414, 440, 461, 463, 470, 608, 633, 651, 653, 704, 717, 764, 781, 803, 808, 922, 928, 929, 971
Tier 4	1, 8, 14, 19, 30, 44, 56, 95, 96, 99, 115, 125, 127, 137, 138, 156, 166, 189, 199, 202, 222, 226, 315, 321, 322, 332, 338, 342, 344, 345, 346, 361, 368, 371, 379, 380, 386, 403, 409, 433, 454, 462, 474, 475, 506, 525, 528, 561, 572, 574, 579, 580, 599, 600, 602, 637, 676, 685, 689, 697, 718, 721, 729, 738, 739, 747, 750, 752, 762, 763, 783, 790, 806, 821, 823, 830, 836, 844, 893, 895, 896, 903, 912, 947, 948, 954, 955, 956, 961

How to Identify a Blue Gem Pattern

If you are wondering how you can identify a blue gem, start with the pattern seed. After that, inspect the skin in-game or through a marketplace preview. A Steam inventory value checker can help after you inspect the item. Since blue placement matters more than the item name, do not trust the title alone. Compare the seed with a Case Hardened pattern sheet, then check tier lists and recent sales. You can also read about CS2 (CS:GO) float, because wear can affect the price even when the pattern looks rare. 

Are Blue Gems a Good Investment?

Blue Gems can be strong collector items, but they are not risk-free. The best Blue Gem CS2 patterns cost more because only a small number of seeds have that strong blue look. Prices can still change as collectors shift their focus or more cases enter the market. A karambit Case Hardened blue gem or rare AK may hold value better than lower-tier patterns, but no skin has guaranteed profit. Check CS2 (CS:GO) rarity, sale history, and demand before you invest.

How to Buy, Sell, and Trade Blue Gems Safely

Before you pay, verify the exact seed, float, wear, and inspect links. Use trusted marketplaces, check the seller’s history, and avoid rushed deals. Since blue gem Case Hardened prices can rank far above normal listings, one wrong pattern can cost you a lot. Search the Steam Market for a base price, then compare third-party sale data for the cheapest blue skin CS2 path. Also, review the official Counter-Strike update notes when you need release context. A blue gem pattern check should come before any trade.

Blue Gems in CS2: Key Takeaways

All in all, Blue Gems stay popular in CS2 because some Case Hardened seeds create rare blue coverage that collectors chase. A CS2 (CS:GO) blue gem gets its value from the pattern seed, blue placement, item type, float, and demand. Knives usually cost the most, although firearms can give you a more affordable start. The best Case Hardened patterns still get major attention because rare colors, old history, and low supply all affect value. So, before you choose blue gem CS2 items, check the tier, compare the seed, and judge the skin by proof instead of name alone.