Peridot Gemstones and Jewelry
Peridot is the name given to gem-quality olivine, which has the chemical formula (Mg, Fe)2SiO4. This green silicate mineral gets its color from magnesium. While most gems occur in different colors, peridot is found only in shades of green. It has a Mohs hardness of around 6.5 to 7 and belongs to the orthorhombic crystal system. Citation
