14.8" Pineapple Quartz Crystal Cluster - Madagascar
This is a beautiful, large cluster of "pineapple" quartz crystals, from Madagascar. The widest crystal is 2.2" and the faces of the crystals are for the most part covered in a hazy purple mineralization. The entire cluster measures 14.8" long by 11.3" wide, weighs 34 lbs and is accompanied by a small rebar display stand.
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.