★ Falchion Knife | Doppler | Ruby

It is one phase of the Falchion Knife Doppler finish, released on March 15, 2017. It drops from the Spectrum Case as a rare special item. The Falchion Knife Doppler (Ruby) 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 $1,321 on October 10, 2025 and trades 53% below that peak. It is down 19% over the past year and down 9.5% over 90 days. Over the past year it traded between $594 and $982. Its all-time low was $484, on October 24, 2025. The CS2 price history API carries the full Falchion Knife | Doppler (Ruby) (Factory New) price history.

Minimal Wear costs 1.5 times as much as Factory New, the cheapest wear.

Steam asks the most at $993, 59% above the cheapest Factory New listing on CSFloat.

Doppler comes in four phases, Phase 1 to Phase 4, plus three rarer gem patterns: Ruby, Sapphire and Black Pearl. The pattern seed fixes the phase, and each phase trades as its own item with its own price. Black Pearl is the most expensive phase at $795, and Phase 1 the cheapest at $251.

6 Factory New copies are listed for sale across the four marketplaces. 15 Factory New copies sold in a recent 7-day window. Factory New is liquid and usually sells within a day.

The Doppler (Ruby) finish also comes on the Bayonet, the Bowie Knife, the Butterfly Knife, the Flip Knife and 13 other weapons. It counts toward the Doppler (Ruby) index.