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

1. In-game inspect — look at the dominant colors
2. Float check tools — CSBoard shows the phase directly on each item listing
3. 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

CSBoard charges 0% for deposits and direct item-for-item exchanges without money. P2P marketplace sales carry a 2% selling fee. Instant sell is a separate buyout offer; check its quote and the chosen payout method’s fees and timing before confirming.