About Blue Gem patterns
MAC-10 Case Hardened wraps the marbled blue-and-gold steel finish around the SMG's receiver and magazine. The pattern seed sets how much deep blue lands on the visible side — most rolls skew gold, and the blue-dominant minority are the Blue Gems.
The guide ranks seeds Tier 1–4 by blue coverage. Unlike most Case Hardened skins there is no single agreed #1 MAC-10 — the gun's separate receiver sections catch blue differently — so Tier 1 holds a cluster of seeds (#667, #239, #222 and others) rather than one apex.
01Tier 1 — Best patterns
The best patterns in this skin. Tightest symmetry, deepest coverage, and the visual hallmarks that separate top-shelf examples from everything else.
Search all T1 patterns on the marketplaces02Tier 2
Very strong patterns — close to T1 quality but with one or two visual compromises (off-axis tip, slightly less coverage, or a less symmetric back).
Search all T2 patterns on the marketplaces03Tier 3
Above-average patterns. Recognisable as "good" but with a clear weakness compared to T1/T2 — useful for buyers who want a hint of pattern premium without paying T1 prices.
Search all T3 patterns on the marketplaces04Tier 4
The lower end of curated patterns. Still better than a random unranked roll, but the visual differentiator is subtle.
Search all T4 patterns on the marketplacesThe remaining ~729 paint_seeds fall outside the curated tiers. They make up the bulk of Phase 1 supply on every marketplace and don’t carry a pattern premium — what you see is what you get, like the baseline reference (seed #276) we used at the top of this guide. If a seed isn’t listed in T1–T4 or BTA above, treat it as Unranked.
Pattern tier classification originally compiled by korenevskiy & Krieke (Steam Community Guide).
Pattern renders are independently generated from live marketplace listings.
This page combines public-domain pattern data with our own renders, live pricing, and cross-marketplace listing search.