Emerald
Emerald The gemstone Emerald belongs to the beryl group and is the most precious variety of beryl. The other varieties of beryl are Aquamarine, Morganite, Red and Green beryl, Heliodor, Maxixe, and Goshenite. The stone derives its colour from the element chrome, while green beryl is coloured by vanadium. The colouring agent chrome is [...]