penetration twinned Cinnabar crystals up to 16 mm long on white Dolomite crystals up to 5 mm long. The Cinnabar crystals are quite large for this species. Lambert Locality Xianxi Mine, Hunan, China Dimensions 34 x 22 x 21 mm.
Red Cinnabar The distinction between a mineral and a gemstone is not always well-defined. In general we can say that an attractive mineral will find use as a gemstone only if it is sufficiently hard and durable to be set in jewelry