Description

PERIDOT IS A GEM-QUALITY OLIVINE AND A SILICATE MINERAL WITH THE FORMULA OF (MG, FE)₂SIO₄. IT IS SOMETIMES MISTAKEN FOR EMERALDS AND OTHER GREEN GEMS. THIS SILICATE MINERAL HARDNESS IS 6.5–7 HARDNESS ACCORDING TO THE MOHS HARDNESS SCALE WITH 3.2–4.3 SPECIFIC GRAVITY. PERIDOT IS AN ORTHORHOMBIC CRYSTAL MINERAL AND CAN BE FOUND WITH VITREOUS OR GLASSY LUSTER.