The heliodor is the yellow variety of the group of beryls.
To learn more about the mineralogy of Heliodorus, see Mindat.org->
The Encylopedia of gems in English is still under construction. Thanks to visit the encyclopedia of gems in French.
< back to the encyclopaedia (379)
Héliodore
- Translations : Heliodor, 黄绿宝石, ヘリオドール
- Synonym : Beryl jaune, Beryl doré
- Etymology : From the Greek «Helios» = sun.
Gemological data
- Chemical formula : Al2Be3(Si6O18)
- Hardness (Mohs) : 7.5 - 8
- Density : 2.7
- Refractive index : Ne=1,562 à 1,594 No=1,566 à 1,602
- Birefingence : -0.006 / - 0.010
- Crystal system : Hexagonal
- Group : Béryl
- Mineralogical Class : Cyclosilicates
The gallery
-
- Heliodore – Heliodor
-
- HELI0002
