Emerald

Beryl variety

Emerald is a gemstone beryl by trace amounts of chromium Beryl has a hardness of 7.5–8 on the Mohs scale Most emeralds are highly included so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate.

Identification

Color of mineral

Green

Mohs scale ( mineral hardness )

7.5

Density ( specific gravity )

1.564

1.568

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Hexagonal