Typically, Case Hardened skins in CS2 feature a combination of two colors - yellow and blue. The Blue Gem pattern is a specific type of Case Hardened skin pattern that showcases a predominantly blue color scheme, with minimal or no yellow coloring present in the skin. Note that there isn’t a single definitive Blue Gem pattern for the Five Seven Case Hardened out there, but a number of patterns that are usually considered by the game’s community as Blue Gems.

Blue Gem patterns are the rarest and most sought-after patterns for any Case Hardened skin in the game.

Currently, the Five-Seven Blue Gem can be obtained via one of three ways - trade-up contracts, trading with other players, or by directly purchasing it off a market. However, as mentioned earlier, the Blue Gem patterns are extremely rare to find.

Fortunately, unlike other Case Hardened skins, the Five-Seven Case Hardened is a Restricted-grade weapon skin. This means that the probability of obtaining a Five-Seven Blue Gem by opening a CS2 Weapon Case 2 is much higher than getting a Karambit Blue Gem, for instance.

The Heat Treated strongly resembles Case Hardened, featuring a variety of interesting patterns. Even though only a few hours have passed since the update, collectors are already hunting for the coolest patterns with the highest concentration of blue color.

https://steamcommunity.com/sharedfiles/filedetails/?id=3343658990

#1 278, 690

#2 868

Rank 1 189, 363, 532, 648, 689, 872

Rank 2 25, 151, 177, 215, 321, 631, 670, 700, 724, 875, 879, 888

Rank 3 13, 28, 101, 103, 126, 265, 344, 369, 381, 387, 413, 426, 428, 430, 434, 450, 468, 555, 557, 627, 661, 768, 770, 791, 809, 823, 844, 849, 874, 905, 927, 935, 955, 969, 979

Rank 4 72, 81, 87, 112, 122, 125, 168, 174, 179, 187, 273, 305, 310, 447, 497, 512, 525, 571, 592, 640, 685, 760, 828, 833, 843, 862, 878, 887, 951, 985

Rank 5 0, 1, 9, 34, 79, 82, 92, 113, 121, 140, 141, 142, 149, 171, 173, 180, 197, 200, 205, 220, 249, 279, 287, 303, 312, 319, 322, 376, 396, 408, 429, 463, 466, 471, 479, 495, 509, 539, 545, 573, 578, 579, 586, 589, 616, 617, 625, 632, 643, 658, 716, 717, 727, 752, 758, 762, 795, 804, 814, 822, 824, 852, 855, 856, 926, 938, 953, 961, 967, 970, 997

https://steamcommunity.com/sharedfiles/filedetails/?id=2948564018

https://steamcommunity.com/sharedfiles/filedetails/?id=2948578790

https://steamcommunity.com/sharedfiles/filedetails/?id=2941982575