Phenacite occurs in nature as white to colorless hexagonal prismatic crystals with rhombohedral faces. Much harder than quartz, it is a rare gemstone found in Brazil, Russia and Burma. The difficult to find transparent crystals are sometimes faceted for use as gemstones. Although these crystals are basically colorless they exhibit a golden glow -- light emanates from within them. Read more about Phenacite in the Crystalpedia.