Records show rock crystal has been used for tools, weapons, decoration and jewelry for at least 4,000 years.
The name quartz is German in origin but another name for the clear varierty, rock crystal, comes from the Greek for ice. Quartz's high thermo- conductivity makes it feel cool to the touch, and for centuries it was believed that clear, rock quartz crystals were permanently frozen ice.
From the late 1960's to the early 1990's, the metaphysical market used raw crystal in jewelry, spheres, sculls, pyramids and as charms. During the height of the trend, these uses accounted for 40% or more of the rock crystal consumed in the United States and resulted in price increases for most of the crystals