6.2" Quartz Encrusted Stalactite Cluster - India
This is a fantastic specimen that contains stalactites that are encrusted in layers of small quartz crystals. The specimen was collected from Maharashtra, India and is 6.2" wide by 3.6" tall. The blue-green mineral that the quartz is coating, is unidentified.
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.