is a Calcium Magnesium Silicate with formula CaMgSi2 O6 and hardness of 5.5-6.
Specific formula is (Ca,Na,Mg,Fe,Cr)2(Si,Al)2O6
This is a rich chromium variety who is responsible for the green color. The chromium, like in most precious stone is the key element for the most attractive colors.
This gem became popular and affordable at the end of 1989 .The best colorful stone are in the size of 2-3 ct. Bigger size tend to be darker due to the extreme intensity of green.
Is a stone that can be set in jewelery with care, I wouldn’t recommed it for a ring...
this stone comes from the mine of Araçuaí in the state of Minas Gerais,Brazil and it has several small inclusions.