The pattern index affects the location, color, and shape of the stains. The pattern variations with a predominance of blue clean stains on the play side “Blue Gem” are considered to be the rarest and the most expensive ones. The pattern variations with 50%-60% of blue on the play side are also quite rare. The cheapest and the most common pattern variations are those with yellow blades or yellow blades with inclusions of blue covering up to 30% of the blade surface.

All M9 Bayonet Case Hardened Blue Gem Patterns: Ranked
The M9 Bayonet Case Hardened features several highly sought-after Blue Gem patterns, which can be categorized into different tiers based on their intricate designs and vibrant blue hues.

Now, to be precise, there is not a single definitive Blue Gem pattern for the M9 Bayonet in CS2. Instead, there are multiple Case Hardened patterns that are recognized by the CS2 community as ‘Blue Gems’ and are highly valued within the game’s marketplace.

The 601 Case Hardened Seed's rarity arises solely because it features a 92% spotless blue finish on the blade, making it one of the cleanest renditions of the Blue Gem series.

58, 107, 150, 239, 253, 349, 354, 403, 406, 417, 449, 503, 517, 523, 550, 585, 634, 675, 897, 946

21, 91, 117, 166, 167, 202, 224, 269, 281, 288, 336, 346, 355, 366, 430, 613, 628, 715, 793, 813, 867, 880

4, 41, 59, 88, 108, 124, 141, 157, 173, 204, 210, 227, 229, 243, 249, 286, 293, 295, 298, 319, 345, 356, 372, 393, 476, 490, 525, 529, 533, 546, 553, 598, 610, 790, 821, 837, 859, 866, 887, 908, 910, 915, 933, 959

2, 63, 64, 97, 103, 113, 136, 138, 156, 162, 176, 177, 179, 209, 246, 251, 292, 308, 351, 353, 369, 401, 413, 445, 473, 475, 496, 506, 507, 516, 518, 524, 526, 556, 564, 573, 619, 632, 651, 674, 681, 698, 706, 735, 759, 764, 779, 783, 794, 808, 811, 835, 869, 871, 902, 904, 916, 941, 963, 968, 989

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