Knife | Doppler sits on the generic knife slot as a legendary skin finished with multicolor electroplating. Wear is locked between 0.00 and 0.08, so you are shopping almost entirely in Factory New and low-end Minimal Wear territory—no battle-scarred drama, just tight margins where a tiny float shift shows on the blade.

Valve’s own line is blunt: black and silver metallic paint laid over a faux-marble look, wrapped in a candy-coat sheen. For buyers, that reads as a warning—thumbnails and highlight reels lie easily. Your purchase decision should end on in-game inspect and 3D view, not on a static screenshot.

Release & crate line

Shipped 2015-01-08 with the same-day update; finish id am_sapphire_marbleized. That date is a solid anchor when you cross-check listings, case history, and how long a given float has been circulating.

Drops from the Chroma Case pool—knives in this finish are among the top-tier unbox outcomes. On C5GAME or Steam Community Market, filter by case source and match the finish name so you do not pay Chroma money for the wrong pool.

What you are actually buying

| Fact | Detail |
|------|--------|
| Weapon | Knife (generic) |
| Finish | Doppler (am_sapphire_marbleized) |
| Rarity | Legendary |
| Style | Multicolor electroplating |
| Float | 0.00 – 0.08 |

The marble read comes from black and silver layers over the electroplated color bands, then that glossy outer coat—spin the knife under inspect light and the face reacts hard to angle. Because the float window is narrow, pattern seed and color placement matter more than on skins that can hide scuffs behind heavy wear.

Shop focus: wear, pattern, display value

• Wear at the cap: At 0.08, edge and tip wear often reads louder on knives than on rifles—compare several listings side by side in inspect.
• Pattern placement: Same finish name does not mean same face; prioritize how the bands sit on the blade you will actually equip.
• Showcase factor: Legendary tier plus Chroma Case pedigree makes this a common flex next to other 2015-era knives—worth it if your goal is a recognizable cabinet piece, less if you only wanted a cheap play knife.

Buying guide verdict

Worth chasing if you want a tight-float legendary knife with a distinctive candy-coat marble look and you will slow-buy after multiple 3D inspects on C5GAME or Steam. Pause if you are guessing from thumbnails or ignoring tip/float—small differences cost a lot in this band.

Editor’s aside

Being fooled by the surface hits harder here than on paper. Treat Doppler like jewelry: the gloss sells the listing, but the blade you equip is the one you inspected. When in doubt, float down one tier and spend the difference on a cleaner tip.