2026 Edition · Complete Case Hardened Guide
CS2 Blue Gem Pattern Guide: Prices, Tiers, and Best Patterns in 2026
TL;DR
- ▸A "blue gem" is a Case Hardened skin with 75-100% blue coverage on the most visible faces, driving prices from $1,000 to over $100,000.
- ▸Tier 1 (elite) patterns like Karambit #387 or AK-47 #661 command 5-50x typical market value; Tier 2 offers 75-90% blue with higher liquidity.
- ▸CSBoard lists thousands of live blue gem patterns with instant filters by weapon, tier, and float — zero trading fees and instant USDT payout.
- ▸Prices for top patterns have risen 15-40% annually since CS2 launch, with some single-digit float AK-47 #661 sales exceeding $150,000.
What Is a Blue Gem?
In CS2 (formerly CS:GO), Case Hardened skins feature randomized camouflage patterns. When a pattern displays extensive blue (usually 75-100% coverage) on the knife blade or gun body, collectors call it a "blue gem." These rare patterns are ranked on community sites like CSBlueGem.com and sorted into tiers: Tier 1 for the top ~15 patterns, Tier 2 for the next ~150, and so on. A pattern’s value scales with blue percentage, placement, and weapon type.
Blue gems exist on every Case Hardened weapon, from Karambit and AK-47 to Butterfly Knife and Five-SeveN. The most desirable patterns combine high blue coverage with striking contrasts and minimal gold or silver patches, especially on the play-side view.