Checking Emerald Gemstone

Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of chromium or sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds have lots of material trapped inside during the gem's formation, so their toughness is classified as generally poor.

Color: Green
Luster: Vitreous
Birthstone zodiac sign: Taurus
Associated month: May
Crystal system: Hexagonal crystal system
Chemical formula: Be₃Al₂SiO₆
Hardness (Mohs hardness scale): 7.5 – 8