Peridot is named for its unique olive green. Its chemical composition is magnesium iron silicate, which is the main component mineral of ultrabasic rocks. The orthorhombic crystal system has short or long columnar crystals, but it is often produced in granular form. Hardness 6.5-7; density 3.3～4.4g/cm3; glass luster to grease luster, often transparent. Gemstones similar […]
