The table above presents the Blue Gem patterns in order of tiers, meaning that the skin becomes bluer as the tier level increases. The patterns in Tier 1 are the most costly, while those in lower tiers are deemed less valuable because they have less blue on the skin. The #1 pattern for Navaja Knife Case Hardened is considered to be 398. Another pattern that closely resembles the #1 pattern is the pattern 407, the difference being, the 838 pattern has a gold tip instead of blue.

Blue Gem Patterns are specific patterns that appear on the blade of the Navaja Knife Case Hardened skin or any other Case Hardened skin. These patterns are created by the way the colors of the skin blend together, resulting in a swirled pattern that resembles a blue gemstone. The rarity and quality of the Blue Gem pattern depend on the amount of blue on the blade and how well the colors blend together.

371, 182, 839, 638, 720, 74, 749, 919, 713, 913

401, 273, 877, 332, 598, 453, 283, 928, 139, 965, 773, 282, 902, 515, 420, 975, 891, 322, 335, 989, 30, 424, 797, 809, 811, 463, 782, 798, 635, 358, 917, 510, 194, 694, 974, 265, 808, 284, 490, 460

632, 73, 67, 889, 507, 793, 664, 387, 269, 776, 846, 92, 853, 256, 377, 522, 214, 330, 847, 905, 136, 727, 341, 185, 868, 630, 655, 642, 29, 418, 494, 942, 499, 884, 466, 615, 32, 432, 595

470, 826, 885, 82, 112, 803, 405, 594, 841, 547, 670, 768, 202, 20, 881, 799, 823, 612, 254, 259, 38, 68, 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, 893

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