Glossary
Muzo Green
«Muzo Green» describes emeralds with a vivid, warm, slightly yellowish green associated with the legendary Muzo mine in Colombia. The trade also speaks of «Old Mine». Some laboratories record this colour as a special note in the report. NOBILITH uses the term only when it appears in the laboratory report.
Read more
- 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 2026-10-04