"Pigeon blood" is a term used to describe the color of high-quality rubies. It refers to a deep, rich red color that is often described as being similar to the blood of a pigeon. This term is used to describe the most highly prized and valuable rubies, which are considered to be the most beautiful and desirable. It is believed that the term originated in the 19th century and was first used by European traders and gem merchants to describe the deep red color of Burmese rubies.
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