Glossary
Pigeon Blood
«Pigeon Blood» is the highest colour designation for rubies: a saturated, luminous red with strong red fluorescence that gives the stone an inner glow. The term only carries weight when a recognised laboratory states it in its report; each laboratory applies its own narrowly defined criteria. At NOBILITH «Pigeon Blood» appears only when the laboratory report states it.
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- KnowledgeHow to read a gemstone dossierA dossier brings together everything that describes a stone – from the laboratory report to custody. Here is how to read it in the right order.Read more
- Laboratory reportsUnderstanding a laboratory reportA laboratory report is a gemstone's most important document. Which information it contains, how to read it and what it does not say.Read more
- GlossaryAbsorption spectrumWhen light passes through a gemstone, the stone absorbs certain wavelengths – the rest make up its colour.Read more
- GlossaryAfghanistanAfghanistan is an old source of ruby and emerald; both are mined in the mountains of the Hindu Kush.Read more
Updated 2026-10-06