Olivine is a magnesium iron silicate mineral and belongs to the orthorhombic crystal system. Kristallerna är korta pelare. Complete crystals are rare. Most of them are irregular round granular aggregates. They have glass luster, genomskinlig till genomskinlig, och hårdhet av 6.5-7.0. Olivine is a kind of self-colored gemstone, which is green due to iron […]
