hardness, it is Human Hair Extensions mainly a collector's stone. Sphalerite is found in several locations, including Bulgaria, Canada, Spain, the Congo, Namibia, the USA and Zaire, however, it is rarely found in gemstone Wigs quality.Tiger's eye is a golden brown, opaque variety of fibrous quartz that is valued for its chatoyancy (the cat's eye effect). This optical phenomenon Virgin Hair is caused by parallel.