Pigeon blood

"Pigeon blood" is the trade color call for the finest natural ruby — a pure vivid red with a very slight blue undertone, strong saturation, medium-dark tone, and no brownish or orangish modifier. The term originated in Burmese ruby trading, where the color was compared to the red of a fresh-killed pigeon's blood (specifically the first drops from the beak, which carry the most saturated red). SSEF and Gübelin use "pigeon blood" as a formal color call only when the stone meets their internal reference standards; GRS uses "Pigeon Blood (GRS-type)" with explicit color, saturation, and fluorescence criteria.

The color is the historical signature of top Mogok rubies. Mogok material from the historical mines around Mogok in northern Myanmar carries the characteristic combination of strong red color, low iron content (which suppresses the brownish modifier other ruby sources show), and strong red fluorescence under daylight (which intensifies the apparent color outdoors). The combination is rare; less than 1% of all ruby production worldwide meets the pigeon-blood color standard.

Mozambique ruby from the Montepuez deposit (discovered in 2009 and dominant in modern production) can reach pigeon-blood color. The Mozambique stones tend to run slightly higher in iron than Mogok material, which sometimes reads as a fractional brownish modifier on the deepest tones; the finest Mozambique pigeon-blood rubies are difficult to distinguish from Mogok by eye, and the origin determination relies on trace-element chemistry from SSEF, Gübelin, AGL, or GRS.

The color call carries a meaningful trade premium. A 3 ct unheated pigeon-blood Mogok ruby with Gübelin or SSEF paper trades $40,000 to $120,000 per carat; a 3 ct unheated pigeon-blood Mozambique with comparable paper trades $8,000 to $25,000 per carat. The same stones without the pigeon-blood call — even at "vivid red" or "fine red" descriptions — trade at 30% to 60% discount.

The "pigeon blood" claim without a top-tier origin and color report is sales language, not a color call. The term is used loosely in retail marketing for any vivid red ruby; the trade-recognised meaning is restricted to stones that have been examined and called by SSEF, Gübelin, AGL, or GRS. A buyer offered a "pigeon blood ruby" should require a copy of the lab report; the absence of a report means the term is not the recognised color call.

Heat treatment does not disqualify a stone from the pigeon-blood color call — heated stones can earn the call from SSEF and Gübelin if the underlying color meets the standard.