2.8" Lustrous, Rich-Green Demantoid Garnet Cluster - Iran
This is a lustrous aggregation of relatively large, rich-green andradite var. demantoid garnets on a diopside matrix. This specimen was collected from Belqeys Mountain in West Azerbaijan, Iran.
Demantoid is a variety of andradite, which in itself is a species of garnet. The chemical composition of demantoid is Ca3Fe2(SiO4)3, with the natural substitution of chromium attributing to the green color of this garnet. Ferric iron is the cause of the yellow in the stone.