4.5" Cactus Quartz (Amethyst) Cluster - Large Crystals
This is one of about a half dozen exceptionally nice clusters of cactus quartz (amethyst) that we just acquired. It has a gorgeous light purple coloration, with large, well defined crystals measuring up to 2" long. Mines in the Magaliesberg Mountains region of South Africa.
Cactus quartz, often also referred to as spirit quartz is a variety of quartz characterized by second generation, druzy crystals, growing on the faces of larger quartz crystals. The small second generation crystals point away from the prism and their orientation is not related to the crystallographic orientation of the central crystal. Cactus quartz is currently only known from the Magaliesberg Mountains region of South Africa, and comes in a variety of shades ranging from white to deep purple, to orange colorations. The deep purple, amethyst points are the rarest and most coveted by collectors.