Nothing in Counter-Strike 2 reads as premium quite like a Doppler. It is the finish that turned knives from a flex into a collector’s market, and the reason a single Karambit can be worth more than the PC you play on. The catch is that the item name tells you almost nothing. Doppler ships as seven separate finishes and Gamma Doppler as five, and which one you get is settled the instant the blade drops, somewhere between a hundred dollars and five figures. Two Karambits with the same name and the same wear can sit at $1,000 and $8,000, and the Steam listing will not tell you which is which. So we put this breakdown together: all 12 variants below, how to tell each one apart on sight, how to verify a phase by its paint index, and what every one of them actually costs on the 2026 market.
Key Takeaways
- The phase drops with the knife and can never change: the game decides whether you got a Ruby or a Phase 3 the same second it hands you the item.
- The Steam Community Market groups every phase under one listing and never tells you which one you are looking at. Tracking phases and their prices means using an extension or a third-party marketplace, where each phase is sold as its own item.
- Valve publishes container odds by rarity tier but never published the split between phases. Any Ruby or Black Pearl odds you have heard about are community estimates built from market supply.
What Is a Doppler Phase in CS2?
A Doppler phase is the specific color scheme your knife came out with. The easiest way to think about it: Doppler is not one skin but twelve different ones that Valve filed under a single name. Which of the twelve you get is settled when the item drops, and it never changes after that.
The phase gets confused with the pattern seed (a number from 0 to 1000 that shifts the artwork around on the blade). On a Case Hardened the seed decides everything, but on a Doppler it only moves the swirls inside the phase you already have. It cannot turn a Phase 3 into a Sapphire.
Two families share the name and nothing else. Doppler arrived with the Chroma Case in January 2015 in pink, red and blue. Gamma Doppler followed with the Gamma Case in June 2016 in green and turquoise. Both are candy coats laid over chrome: the dark areas on a blade are not black paint, they are the metal itself sitting in shadow. Knife Dopplers are capped at a float value of 0.08, so they only exist in Factory New (FN) and Minimal Wear (MW).
Ruby, Sapphire or yet another Phase 3: it all comes down to one roll, and CSGOFast is where you take it.
CS2 Doppler Phase Chart: All 12 Phases
| Finish | Phase | Paint Index | Dominant Colors | How to Spot It |
| Doppler | Phase 1 | 418 | Magenta through the middle, violet-blue at both ends | Two colors split along the blade |
| Doppler | Phase 2 | 419 | Magenta and purple end to end | One color from tip to guard |
| Doppler | Phase 3 | 420 | Deep blue with a teal-green zone | The only numbered phase with green |
| Doppler | Phase 4 | 421 | Blue and violet | Blue, but no green at all |
| Doppler | Ruby | 415 | Red running to orange in the light | No other phase puts red on a blade |
| Doppler | Sapphire | 416 | Bright blue with lighter swirls | Blue without a single violet patch |
| Doppler | Black Pearl | 417 | Smoky violet and purple | Low contrast, shimmer only in motion |
| Gamma Doppler | Phase 1 | 569 | Blue, green and a near-white tip | Three distinct zones on one blade |
| Gamma Doppler | Phase 2 | 570 | Deep jade green | Even dark green, almost an Emerald |
| Gamma Doppler | Phase 3 | 571 | Cyan and teal with green in the middle | Dense cyan, the “aqua” look |
| Gamma Doppler | Phase 4 | 572 | Pale cyan with lime patches | The lightest of the four |
| Gamma Doppler | Emerald | 568 | Solid green | Even green, no teal and no variation |
The Glock-18 | Gamma Doppler uses its own paint index block, 1119 to 1123, with the same five phases.
Doppler Phases 1-4 Explained
The four numbered phases carry the same texture at different points in its color cycle and make up the bulk of Doppler supply.
Phase 1
Magenta and hot pink through the middle of the blade, with violet and blue taking over at the tip and again down by the guard. Phase 1 is the two-color phase, which is exactly how you separate it from Phase 3: same split layout, green in place of the pink. The blue ends are what separate it from Phase 2, because if the pink runs the whole blade without a break, you are looking at a Phase 2.
Phase 2
The pink one, and the phase the community has treated as the best-looking of the four for a decade. Magenta and purple run the full length of the blade with no second color breaking in, which is the fastest way to tell it from Phase 1. Copies vary inside the phase too: on some the pink lies evenly from tip to guard, on others darker patches surface near the tip.
Phase 3
Deep blue with a dark teal-green zone near the tip, and the only numbered phase carrying any green at all. That green is the entire identification trick, because the blue across the rest of the blade looks a lot like Phase 4 in a small photo. If no angle shows you any green, look for violet instead: Phase 4 has it and this one does not.
Phase 4
Blue and violet with no green anywhere, and the most evenly covered of the four numbered phases. Certain seeds run nearly the whole blade in clean blue and trade under the name “max blue,” and those are where the fake Sapphire problem starts. There is one tell against a real gem: the violet, which a Sapphire does not carry anywhere.
Ruby, Sapphire and Black Pearl: The Three Doppler Gems
The gems drop the multi-color swirl and paint the blade in one tone, out of the same container as the numbered phases and at odds Valve has never disclosed.
Ruby
One solid red that runs to orange where the light catches it, with none of the marbling the numbered phases have and no trace of blue or violet. Not every Ruby is equal: on some copies dull, darkened patches surface near the tip, and against a clean blade that shows at a glance. Nothing else in the family gets mistaken for it, because no numbered phase puts this much red on a blade.
Sapphire
One bright blue from tip to guard with lighter swirls moving inside it, and no violet, no pink and no second color anywhere on the blade. Dark patches spoil the look here the same way they do on Ruby, so two Sapphires on the same model at the same float can still look quite different. The real question when buying is whether it is a Sapphire at all: check it against Phase 4 by the violet, which the gem does not have.
Black Pearl
Smoky violet and purple rather than one solid color, lower in contrast than anything else in the family, with the oil-slick shimmer that only shows up once the blade moves. Standing still it looks like a muted Phase 2, and that is precisely the trap: a static photo of one passes for the other, so verify in motion or by paint index. Supply is the thinnest of anything in the family: every numbered phase has many times more live listings than this one.
Gamma Doppler Phases 1-4 Explained
Gamma Doppler covers ten knife models plus the Glock-18, the only weapon in the family. Source 2 rebuilt its palette: the dark field that covered most of the blade in CS:GO is gone. The side effect is that the phases now sit closer together, all four in the same bright green and cyan range, separated mainly by how saturated the green is.
Gamma Doppler Phase 1
Blue down by the guard, green through the middle, and a pale near-white blue at the tip: the widest color range of the four Gamma phases on a single blade. In CS:GO it was a mostly empty dark field with one green patch and a reputation as the ugly one of the set, and Source 2 filled that space in. It sells to players who want the loudest knife rather than the greenest.
Gamma Doppler Phase 2
Deep jade green across the whole blade with almost no contrast, and the closest thing to an Emerald that is not actually a gem. The greenest seeds get listed as near-Emeralds. Contrast is what separates them: a Phase 2 still runs darker and lighter stretches along the blade, while an Emerald lies flat.
Gamma Doppler Phase 3
Cyan and teal with green pooling in the middle, the mix the community calls “aqua.” It reads cooler than Phase 2 and deeper than Phase 4, and the murky tint it carried in CS:GO is gone completely. Saturation is what separates it from Phase 4: where Phase 3 runs dense cyan, Phase 4 runs pale.
Gamma Doppler Phase 4
The lightest of the four: pale cyan and turquoise broken up by lime-green patches, more sky than sea. Those lime patches are the giveaway, because no other Gamma phase runs this much contrast between a pale background and its green stretches.
Emerald
One saturated green from tip to guard with no blue or teal breaking it up, darkening a shade the moment you step out of direct light. There are no bad Emerald seeds, since the finish is uniform by definition, so the only variables left are the knife model and the float value. And there is one check that settles it: any teal at all, or any visible shift in brightness along the blade, and you are holding a Phase 2 rather than the Gamma family’s only gem.
Gem money does not appear out of nowhere, and CSGOFast is one way to build up a balance toward a Doppler of your own.
How to Check Which Doppler Phase You Have
Valve does not print the phase name on the item card, but the number behind it sits right there in game. Inspect the knife, open the “i” icon in the inspect menu and find the Finish Catalog line: that is the paint index. For a listing you do not own yet, copy its inspect link into any float or inspect tool instead.
Either route gives you the same number to match: 415 Ruby, 416 Sapphire, 417 Black Pearl, 418-421 Phases 1-4, 568-572 for Gamma with Emerald first.
Never settle a high-value trade on a screenshot. Lighting angles change how a blade reads, and a well-photographed dark Phase 2 is the oldest Doppler scam there is.
Be just as careful with older pictures, because Source 2 repainted this entire family. Gamma Doppler Phase 1 used to be a mostly dark blade with one green patch and now runs blue to green to near-white, so CS:GO-era screenshots are showing you knives that no longer exist. The new lighting adds a second problem: the same blade reads differently from scene to scene.
CS2 Doppler Phase Prices by Knife Tier
The model sets your bracket and the phase sets your premium inside it, so a Karambit Phase 3 costs more than a Shadow Daggers Emerald. To keep that straight, we sorted the 18 Doppler knives into three tiers:
- Tier S (animation knives): Butterfly Knife, Karambit, M9 Bayonet.
- Tier 1 (solid mid-range): Bayonet, Flip Knife, Stiletto Knife, Talon Knife, Skeleton Knife, Huntsman Knife, Nomad Knife, Ursus Knife.
- Tier 2 (entry level): Gut Knife, Bowie Knife, Falchion Knife, Shadow Daggers, Navaja Knife, Survival Knife, Paracord Knife.
Ranges below are Factory New medians from a June 2026 snapshot across 36 marketplaces, running from the cheapest model in each tier to the most expensive.
| Tier (Doppler, FN) | Phase 1 | Phase 2 | Phase 3 | Phase 4 | Sapphire | Ruby | Black Pearl |
| Tier S | $1,060 – $2,460 | $1,430 – $4,880 | $1,060 – $2,360 | $1,170 – $2,970 | $4,810 – $6,870 | $8,720 – $11,210 | $7,800 – $11,070 |
| Tier 1 | $430 – $840 | $550 – $1,020 | $430 – $850 | $460 – $900 | $1,330 – $1,920 | $1,910 – $2,820 | $670 – $2,760 |
| Tier 2 | from $120 | from $140 | from $120 | from $120 | from $220 | from $320 | from $330 |
Black Pearl prices start where the table says and climb from there, because supply is thin enough that a marketplace rarely holds more than one copy at a time.
| Tier (Gamma Doppler, FN) | Phase 1 | Phase 2 | Phase 3 | Phase 4 | Emerald |
| Tier S | $1,390 – $2,380 | $1,820 – $2,920 | $1,420 – $2,000 | $1,390 – $2,000 | $7,730 – $8,400 |
| Tier 1 | from $560 | from $730 | from $550 | from $590 | from $1,820 |
| Tier 2 | from $110 | from $110 | from $110 | from $110 | from $230 |
| Glock-18 | $160 | $170 | $160 | $160 | $600 |
Three things fall out of the tables:
- The pricier the knife, the steeper the gem premium. A Karambit Ruby runs about six of its Phase 3s, a Navaja Ruby under three.
- A real gem costs a couple of hundred dollars. The cheapest in the game are the Navaja Sapphire and the Shadow Daggers Emerald, both around $220-230.
- Some knives cost more in Doppler, others in Gamma. On the Karambit, M9 Bayonet and Bayonet the Gamma version runs higher. On the Butterfly Knife it goes the other way.
Case battles on CSGOFast put several players through identical Chroma or Gamma containers at once, with the best haul taking everything.
FAQ
Does StatTrak make a Doppler knife worth more?
Not the way it does on a rifle, and the price shows it: a StatTrak knife usually carries no premium at all and often trades below the regular version. The counter sits on the blade itself, and plenty of players think it spoils the look, especially on a finish whose whole appeal is unbroken color. That holds for every knife, not just Doppler.
Should I buy a Doppler in Minimal Wear instead of Factory New?
Often yes, but judge the individual copy. Knife Dopplers only span a float range of 0.00 to 0.08, so the top of Factory New and the bottom of Minimal Wear are hard to tell apart. After that it comes down to the model: on some knives the wear hides in the swirls, on others it surfaces as chipping along the edge, and it shows up worst on the single-color gems. Compare screenshots of the two actual listings rather than their wear labels.
Do gloves have Doppler phases?
No. Doppler and Gamma Doppler exist on knives and on exactly one gun, the Glock-18. Gloves have their own pattern-dependent finishes but no phase system, and neither the Kukri Knife nor the Classic Knife has ever received a Doppler finish either.
Why is the finish called Doppler?
It refers to the Doppler effect, the shift in a wave’s frequency as the source and the observer move relative to each other. The finish does the visual version of that: the colors travel across the blade as you turn it, which is exactly why a phase is so hard to judge from a static screenshot.
Did the Doppler phases change when CS2 came out?
Yes, and not purely for the better. Source 2’s lighting made the blades brighter and cleaner, but it also pushed the phases closer together. Gamma Doppler took that hardest: Phase 1 used to be identified by the dark field covering most of the blade, and now all four phases are bright and separated mainly by green saturation. Add that the same knife reads differently depending on the lighting in a scene, and it becomes clear why checking the paint index matters more today than it did in CS:GO.
Will Valve add Doppler to more knives?
It keeps happening, slowly. The Fever Case brought standard Doppler to the Skeleton, Nomad, Paracord and Survival knives in 2025, and Gamma Doppler still covers only ten of the twenty knife models in the game. Nothing else is announced, so plan around the finishes a model carries today.
I write about CS2 skin gambling , focusing on how things actually work rather than how they are marketed. Most of what I cover comes down to game mechanics, risk, and the small details that people usually overlook when getting started.
