CS2 Doppler Phase Guide: Ruby, Sapphire, Black Pearl & Emerald Prices (2026)
What Are Doppler Phases?
Doppler is one of the most popular CS2 knife finishes. Every Doppler knife has a phase — a color pattern that determines its appearance and value. There are 8 phases total: Phase 1-4 (common), and four rare gem phases: Ruby, Sapphire, Black Pearl, and Emerald (Gamma Doppler only).
The phase is determined when the knife is unboxed and cannot be changed. Two identical knives with different phases can differ in price by 10x or more.
Standard Doppler Phases (Phase 1-4)
| Phase | Colors | Starting Price | Notes |
|---|---|---|---|
| Phase 1 | Dark purple/pink + black | From $109 | Darkest standard phase, popular for its clean look |
| Phase 2 | Pink/magenta + purple | From $112 | Most pink = most valuable of standard phases |
| Phase 3 | Green/teal + blue + black | From $112 | Most green, generally the least popular |
| Phase 4 | Blue + purple | From $109 | Most blue = "Max Blue" variants are premium |
Price hierarchy for standard phases: Phase 2 > Phase 4 > Phase 1 > Phase 3 (generally, but varies by knife type)
Rare Gem Phases
Ruby (Red Doppler)
Full red/pink color with no black or blue patches. The second most valuable phase overall.
- Price range: $298 – $29,125
- 63 variants currently tracked
- Most expensive: ★ StatTrak™ M9 Bayonet | Doppler Ruby (MW) — $29,125
- Most affordable: Glock-18 | Gamma Doppler Ruby variants start around $298
Sapphire (Blue Doppler)
Full blue color, no other colors mixed in. Often considered the most visually stunning.
- Price range: $215 – $9,886
- 67 variants currently tracked
- Sapphires often cost slightly less than Rubies for the same knife
Black Pearl
Dark iridescent finish that shifts between purple, green, and blue. The rarest standard Doppler phase.
- Price range: $437 – $15,170
- 46 variants currently tracked
- Most expensive: ★ StatTrak™ Butterfly Knife | Doppler BP (FN) — $15,170
- Rarest of all standard Doppler phases
Emerald (Gamma Doppler only)
Full green color, exclusive to the Gamma Doppler finish. The rarest Gamma phase.
- Price range: $237 – $14,094
- 42 variants currently tracked
- Only exists on Gamma Doppler knives — not on regular Doppler
Price Comparison by Knife Type
Prices vary dramatically by knife type. Here are the most popular Doppler knives (Factory New, Buff163 prices, March 2026):
| Knife | Phase 1-4 | Ruby | Sapphire | Black Pearl |
|---|---|---|---|---|
| Butterfly Knife | $1,400–1,800 | $12,305 | $8,500+ | $15,170 (ST) |
| M9 Bayonet | $350–500 | $3,500+ | $3,200+ | $2,800+ |
| Karambit | $350–500 | $3,000+ | $3,500+ | $2,500+ |
| Bayonet | $200–300 | $1,500+ | $1,400+ | $1,200+ |
| Navaja | $109–130 | $300+ | $250+ | $437+ |
How to Identify Doppler Phase
- In-game inspect — look at the dominant colors
- Float check tools — CSBoard shows the phase directly on each item listing
- Paint seed — determines exact pattern within the phase
On CSBoard, you can filter by Doppler phase in the browse catalog. Select "Doppler" finish and pick your desired phase — Ruby, Sapphire, Phase 2, or any other.
Investment Potential
Rare Doppler phases (Ruby, Sapphire, Black Pearl, Emerald) tend to appreciate over time because:
- Supply is fixed — no new ones are created unless more cases are opened
- Demand grows as CS2 player base expands
- StatTrak variants are especially rare and valuable
Phase 2 (most pink) and Phase 4 "Max Blue" patterns are the best investment among standard phases, as they command premiums over Phase 1 and 3.
Buy or Sell Doppler Knives on CSBoard
Browse all Doppler knives with phase filters at csboard.trade/browse. Want to sell your Doppler knife? Get instant USDT payout at csboard.trade/sell — no fees, paid in under 60 seconds.