4" Polished Blue Quartz Sphere - Madagascar
This is a beautiful sphere made from blue quartz collected in Madagascar. The entire sphere has been flawlessly polished to a glossy-finish and is accompanied by an acrylic ring display stand. While quartz that's marketed as "blue quartz" typically refers to quartz with dumortierite or other blue mineral inclusions, this material gains its blue color naturally from its structure. When backlit, the quartz has an orange color, but shows its blue color when viewed under a light source as seen in the photos above.
Silicon Dioxide, also known 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.
4" in diameter