Glossary
Cornflower Blue
«Cornflower Blue» describes sapphires with a pure, highly saturated blue in medium tone – velvety and luminous at once. Historically the colour is associated with sapphires from Kashmir; laboratories today grant the designation on colour alone, regardless of origin. At NOBILITH it applies only with confirmation 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