This Specimen has been sold.
3" Realistic, Polished Brazilian Quartz Crystal Skull
This is a 3" long, polished quartz skull from Brazil. This quartz specimen has undergone intricate sculpting and polishing that left the crystal in the shape of a skull. There is some slight pink coloration to the quartz, however not enough to comfortably label as rose quartz.
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.