What are Doppler phases in CS2?
Doppler has Phase 1, 2, 3 and 4, plus Ruby, Sapphire and Black Pearl. Gamma Doppler has its own four phases and Emerald. The variant is identified by its finish or paint index; the seed changes the pattern within that variant, while float describes wear. Compare the exact variant before quoting a price.
The phases and what they look like
Doppler is a marbled finish of black, blue, pink and red. Phase 1 mixes blue and red with a dark base, Phase 2 leans pink and red, Phase 3 is mostly black with blue and green highlights, and Phase 4 is predominantly blue. Ruby is a solid red, Sapphire a solid blue and Black Pearl a dark purple-black with a pearl sheen.
Gamma Doppler is a separate family with prominent green tones and the Emerald variant. Colours vary with the model, seed and lighting, so identify the finish from item data rather than a screenshot alone.
Phase, seed and float
Unlike a Blue Gem, the phase is not chosen by the paint seed. Each phase is its own finish with its own paint index inside the same market name, so the Steam Community Market lists all Doppler phases of a knife under one listing and shows the phase only in the item details. The seed still moves the marble within a phase, which is why collectors speak of a "pink galaxy" Phase 2 or a "max blue" Phase 4.
Float applies as usual. Doppler knives drop as Factory New and Minimal Wear only, so the wear spread is narrow and the phase drives most of the price difference.
- Skinory shows the phase on the item page and keeps separate prices where marketplaces list phases separately.
- The float checker shows the phase, float and seed when the corresponding item data is available.
- The patterns section covers the other seed-dependent finishes.
Which knives have Doppler
Check the catalogue and pattern pages for the exact knife model and finish. Availability differs between models; a Doppler listing does not establish that every model has every finish or that phase probabilities are identical.
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Which Doppler phase is the most expensive?
There is no guaranteed price order across all models and dates. Compare the same knife, phase, wear and StatTrak status. A generic Doppler price is not a quote for Ruby, Sapphire or Emerald.
Can I trade up to a specific phase?
Do not assume that contracts cannot produce knives: Valve expanded eligible contracts in its 22 October 2025 update . An eligible contract is not a promise of a chosen Doppler phase; check its inputs and possible outputs under the current rules.
Why does a Steam listing not say the phase?
All phases share one market name on Steam. Check the item details or the inspect link before buying; marketplaces usually show the phase in the listing title.