CS2 Pattern Seeds: Blue Gems, Fades and Doppler Phases
Two copies of the same skin, same wear, same float, can differ in price by a factor of a thousand. The reason is a number between 0 and 999 that most players have never looked at.
Alongside its float value, every CS2 skin gets a pattern seed (also called paint seed or pattern index) between 0 and 999 when it is created. The seed decides where the finish's texture is positioned on the weapon model. For most skins the texture is uniform and the seed is cosmetically meaningless. For a handful of finishes, it is everything.
Case Hardened: the Blue Gem lottery
The Case Hardened finish is a mottled mix of blue, purple and gold, and the seed decides which patches land on the visible surfaces. Mostly-gold rolls are common and cheap. Mostly-blue rolls, the Blue Gems, are the most famous pattern chase in the game.
The hierarchy is documented seed by seed in community databases. On the AK-47, pattern 661 is the benchmark: a clean blue top with prices in six figures. On the Karambit, pattern 387 is the crown jewel; its Factory New copy was reportedly sold in a deal valued at over $1 million in 2024, the highest figure ever attached to a CS2 item. Tier-2 and tier-3 blue seeds still carry premiums of 2x to 50x over a random roll.
Fade percentages
Fade skins blend purple, pink and yellow in a gradient, and the seed controls how much of the rarest color survives. The community grades them as fade percentages, typically 80% to 100%. A 100% "full fade" on a knife carries a clear premium; on some models the difference between 90% and 100% is a few hundred euros for an otherwise identical item. Percentages are read from the seed via lookup tables, not measured in game.
Doppler phases
Doppler is technically several different textures sharing one name, and the seed decides which one you get. The market treats each phase as its own item with its own price:
| Phase | Look | Price tier |
|---|---|---|
| Phase 1 - 4 | Mixes of dark blue, purple and pink | Base; P2 (pink-heavy) and P4 (blue-heavy) lead |
| Ruby | Solid deep red | Multiples of the base phases |
| Sapphire | Solid vivid blue | The most expensive standard Doppler |
| Black Pearl | Dark iridescent purple-green | Rarest roll, prized by collectors |
| Gamma: Emerald | Solid green (Gamma Doppler only) | Top of the Gamma line |
Marketplaces list phases explicitly, so unlike Blue Gems there is no hidden knowledge here, just a steep price ladder. Browse the live Doppler rankings to see the ladder in current numbers.
The rest of the pattern families
- Marble Fade knives chase "Fire & Ice" seeds: maximum red and blue, minimal yellow. True first-max seeds on the Karambit command five figures.
- Crimson Web pricing follows web count and placement; a centered triple-web Factory New is a collector item.
- Slaughter patterns are read like ink blots: heart and diagonal shapes on the blade add real premiums.
Checking a seed before you buy
Serious pattern buying happens off the raw listing: pull the inspect link, check the seed against the community tier lists, and look at the actual screenshots rather than the finish's stock image. Every SkinFolio item page links out to the marketplaces carrying the item so you can inspect the exact copy. For pattern-blind purchases, that thirty seconds of checking is the difference between buying a skin and accidentally selling someone else their retirement.
Frequently Asked Questions
How do I find out my skin's pattern seed?
The seed is not shown in game. Inspect links run through float-checking tools reveal it, and marketplaces like CSFloat display the paint seed on every listing. For pattern-sensitive skins, community databases map which seeds produce the desirable looks.
Do patterns matter on every skin?
No. For the vast majority of finishes the seed shifts the texture invisibly and adds nothing. Pattern premiums exist only where the texture placement changes the look dramatically: Case Hardened, Fade, Doppler, Marble Fade, Crimson Web and a handful of others.
What is the most expensive pattern ever sold?
A Karambit | Case Hardened with the pattern 387 Blue Gem, widely reported to have changed hands in a deal valued at over $1 million in 2024. On the rifle side, the AK-47 Case Hardened pattern 661 is the benchmark, with clean copies valued in six figures.
Is a StatTrak pattern worth more?
Usually yes, because it is rarer: the pattern premium multiplies with the StatTrak premium rather than adding to it. But the buyer pool for five-figure StatTrak patterns is tiny, so selling takes longer and prices are more negotiable.