Spirit Quartz is a somewhat strange member of the Quartz family – a community within a stone. The core, a regular shaped crystal with a smooth termination, is encrusted with thousands of tiny crystal termination points. Also referred to as Cactus Quartz or Porcupine Quartz, it is found only near Boekenhouhoek, South Africa – although it is often erroneously reported to be from the Magaliesberg Mountains. Most Spirit Quartz is Amethyst, though Citrine, Smokey, and White Quartz are also found.