Olivine is a magnesium iron silicate mineral and belongs to the orthorhombic crystal system. I cristalli sono corti colonnari. Complete crystals are rare. Most of them are irregular round granular aggregates. They have glass luster, da trasparente a traslucido, e durezza di 6.5-7.0. Olivine is a kind of self-colored gemstone, which is green due to iron [...]
