Pigeon’s Blood: What the Term Certifies

The term arrives before the stone does. A seller writes pigeon’s blood in a message and waits for the price to follow. Sometimes the words are on a report. Often they are doing work no laboratory authorised.

Pigeon’s blood is a colour appellation. It describes a vivid red at full saturation, carrying the fluorescence fine Burmese material is known for, and it is granted only after a laboratory has examined the stone. SSEF and Gübelin harmonised their criteria in 2015 — brilliance across the face, no dominant window, colour that holds. That is the closest this trade has come to a shared definition.

Not every laboratory plays. GIA does not use the term at all; its reports describe colour in their own language and never mention a pigeon. A stone without those words on paper is not automatically a lesser stone — it may simply have gone to a laboratory that declines trade vocabulary. Others grant the appellation more readily, and the same ruby can travel between laboratories and come back wearing a different name.

What the term does not certify: clarity, cut, proportion, or the absence of heat. Those are separate lines on the report, and they are the lines I read first. A stone can carry the appellation and still be sleepy, windowed, or heated, depending on which laboratory signed it.

My own order of work does not change for two words. I judge colour in daylight, against master stones, before I look at the paper. If the colour is there, the laboratory will say so in whatever language it prefers. If a seller leads with the term and the report is on request, the term is the product being sold — not the ruby.

The trade loves a phrase that carries a premium. My rule is older and duller: buy the stone, then read the paper, and never in the other order.