Andradite var. Demantoid
 
Locality: Tubussis Farm 22, Erongo Region, Namibia
 
Specimen size: Miniature - sized
Size: 48 mm x 29 mm
Weight: 25 grams
 
A lovely small specimen of shiny, olive-green Demantoid Garnets on matrix.
 
Demantoid is the green gemstone variety of the mineral Andradite, a member of the garnet group of minerals. Andradite is a calcium- and iron-rich garnet. The chemical formula is Ca₃Fe₂(SiO₄)₃ with chromium substitution as the cause of the Demantoid green color. Ferric iron is the cause of the yellow in the stone.