6.7" Large, Quartz Crystal With Hematite Inclusions - Brazil
This is a beautiful cluster of quartz crystals from Brazil. Most often crystals of this size will have some polishing to the facets, however this specimen has no polishing whatsoever. There is some minor chipping to the tip of the largest crystal and there are natural fractures through the crystals, though there is no indication of any repair to this cluster. This is a truly wonderful specimen that would make an excellent display piece for any mineral collector.
Silicon Dioxide, also know as SiO2 or Quartz, is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich, hot watery solutions called hydrothermal environments, at temperatures between 100°C and 450°C, and usually under very high pressure. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountains forming, and can be hundreds of millions of years old.