Two varieties of quartz are called rose quartz. One is found in translucent masses made of intergrown anhedral crystals. It is always showing a hazy to translucent character due to microscopic fibrous inclusions of a pink borosilicate mineral related to dumortierite. The other variety occurs in well-formed crystals of similar colour. The colour is apparently caused by irradiation-induced colour centres based on Al and P, that replace Si in the atom lattice.