The Diamond Index
Live price discovery for rare Counter-Strike skin patterns
Counter-Strike skins trade in a market worth billions. Two with the same name and condition can differ in price by multiples, on one hidden number.
01
The hidden variable
Every skin is minted with a paint seed, an integer from 0 to 1000 that sets where the finish lands on the weapon. On most skins it barely shows. On a valuable few it makes a named pattern: a blue gem, a diamond gem, a full web.
2.3×the price, for $2,159 of difference between two listings of the same knife in the same condition. Open either for every system’s verdict.
02
Nobody official ranks them
Valve publishes the seed but never says which patterns are good. Community researchers do, in Steam guides that sit outside every marketplace, so a buyer has to leave the listing and read the seed by hand. The Diamond Index turns those guides into rules and applies them to every live listing on CSFloat. It invents no grades of its own: each guide’s verdict is kept, disagreements stay visible, and the author is credited.
03
Sorted by tier
Pick a guide, press a tier, and the book sorts itself. Below, the cheapest Factory New Karambits in each tier, live.



Tier
Tier 1#218

$3,879
Tier 1#287

$3,980
Tier 1#783

$4,300
Tier 1#217

$5,000
04
Architecture
A worker reads CSFloat continuously. The rules engine grades every listing’s seed against every guide that covers it. The site reads the result.
Questions, bugs or ideas: [email protected]