Perspective stone, also known as green copper mine, English name is Dioptase, derived from Greek, Dia means “прозрачен”, Optasia means “виж”, indicating that this mineral can see its cleavage surface through the crystal, so It is called a perspective stone. See-through stone is a kind of water-containing copper silicate, принадлежащи към тригоналната кристална система, […]
