Master Guide to Skeleton Knife Case Hardened Blue Gem Playside Patterns & Tier Rankings

Contrary to popular belief, the wear of a Case Hardened skin has no impact on determining whether a skin is a Blue Gem or not. In fact, the amount of blue color in a Case Hardened skin is determined solely through its pattern index - a number that is automatically set by the system as soon as the skin is unboxed and can't be changed afterward.
The higher the percentage of blue color present in a Blue Gem, the more highly the pattern index is regarded within the community. Ideally, a Tier 1 Blue Gem should have a full blue playside, with no traces of yellow being present. The amount of blue in the backside isn't taken into account when ranking Blue Gems in CS2.
The legendary #403 pattern represents the pinnacle of Skeleton Knife Case Hardened playside patterns, featuring a full blue playside that makes it the most sought-after pattern in the collection.
Note: This guide shows only Blue Gem Playside patterns. There is also a separate guide available for Skeleton Blue Gem Backside patterns.
Enter your Skeleton Knife Case Hardened inspect URL to check if you have a Blue Gem playside pattern and its tier:
1 pattern - The legendary #403

The legendary #403 pattern represents the pinnacle of Skeleton Knife Case Hardened playside patterns. This is the most valuable and sought-after Skeleton Knife Case Hardened pattern in existence, featuring a full blue playside with no traces of yellow, making it extremely rare and valuable.
6 patterns - Exceptional blue playside coverage

A Tier 1 Blue Gem, which features the most amount of blue on the playside, is considered the most valuable after the #1 pattern, with a correspondingly higher price point. These patterns have exceptional blue playside coverage with minimal yellow areas.
16 patterns - Great blue playside coverage

A Tier 2 Blue Gem, although still valuable, will have a lower price point than a Tier 1 Blue Gem. These patterns have great blue playside coverage with some yellow areas but still maintain impressive Blue Gem status.
38 patterns - Good blue playside coverage

A Tier 3 Blue Gem will be less valuable than a Tier 2 Blue Gem. These patterns have good blue playside coverage with more noticeable yellow areas but still qualify as Blue Gem patterns, providing solid value for collectors.
83 patterns - Average blue playside coverage
The rank or tier of the Blue Gem is an important factor in determining its value. Tier 4 patterns have average blue playside coverage with significant yellow areas but still maintain Blue Gem classification, providing entry-level access to the Blue Gem category.
Pattern #403 is the holy grail of Skeleton Knife Case Hardened with full blue playside coverage - extremely rare and valuable.
The wear of a Case Hardened skin has no impact on Blue Gem classification - it's determined solely by the pattern index.
Only playside blue coverage matters for Blue Gem rankings - backside blue is not considered in tier classifications.
Ideally, a Tier 1 Blue Gem should have a full blue playside with no traces of yellow being present.
There is also a separate guide available for Skeleton Blue Gem Backside patterns for collectors interested in backside coverage.
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