★ Falchion Knife | Gamma Doppler | Emerald

It is one phase of the Falchion Knife Gamma Doppler finish, released on September 21, 2021. It drops from the Operation Riptide Case as a rare special item. The Falchion Knife Gamma Doppler (Emerald) runs from 0.00 to 0.08 in float, so it comes only in Factory New and Minimal Wear, and it has a StatTrak version.

Factory New peaked at $1,375 on October 31, 2023 and trades 69% below that peak. It is down 25% over the past year and down 16% over 90 days. Over the past year it traded between $422 and $837. Its all-time low was $421, on October 24, 2025. The CS2 price history API carries the full Falchion Knife | Gamma Doppler (Emerald) (Factory New) price history.

Minimal Wear costs 1.3 times as much as Factory New, the cheapest wear.

Steam asks the most at $606, 42% above the cheapest Factory New listing on CSFloat.

Gamma Doppler comes in four phases, Phase 1 to Phase 4, plus the rare Emerald gem pattern. The pattern seed fixes the phase, and each phase trades as its own item with its own price. Emerald is the most expensive phase at $427, and Phase 4 the cheapest at $181.

11 Factory New copies are listed for sale across the four marketplaces. 24 Factory New copies sold in a recent 7-day window. Factory New is liquid and usually sells within hours.

The Gamma Doppler (Emerald) finish also comes on the Bayonet, the Bowie Knife, the Butterfly Knife, the Flip Knife and six other weapons. It counts toward the Gamma Doppler (Emerald) index.