The name emerald is used for the green variety of the crystal Beryl. 

Birthstone for March and a Hardness of 7.5-8 

$4,960.00
2.68ct Emerald, Vintage, Oval   A mid to high quality large emerald. Its a vintage piece, so a guarantee of origin isn't available but its colour and inclusions suggest Columbia. Its quite thick with natural inclusions (known as the...