CSBlueGem review — The canonical Case Hardened blue gem database.

CSBlueGem is the deepest single-source database for Case Hardened patterns — every weapon's blue gem rankings, tier 1 / tier 2 lists, named patterns ("Scar Pattern", etc.), and live listings filtered by seed. The community treats it as the authoritative source for high-stakes blue gem trades. Limited to Case Hardened. Doesn't cover Crimson Web, Marble Fade, Doppler, or other pattern families.