Olivine is a magnesium iron silicate mineral and belongs to the orthorhombic crystal system. Krystallerne er korte søjleformede. Complete crystals are rare. Most of them are irregular round granular aggregates. They have glass luster, gennemsigtig til gennemsigtig, og hårdhed af 6.5-7.0. Olivine is a kind of self-colored gemstone, which is green due to iron […]
