Calcite is an extremely common calcium carbonate mineral. Ол тригональды кристалдық жүйеге жатады. Its crystal shape and habits are ever-changing. There are dozens of monomorphs and hundreds of polymorphs, which are incomparable to any other mineral. The crystals are in the shape of compound trigonal partial triangles, rhombohedrons and hexagonal prisms. The aggregates [...]
