6.35" Realistic, Polished Moss Agate Skull
This is a 5.9" long polished skull that was formed from moss agate. The agate has been meticulously sculpted and polished into the shape of a skull. There are several pockets throughout this skull that are encrusted in quartz crystals. The underside of the skull has been hollowed-out, making the specimen closer in resemblance to a real skull.
Moss agate is a variety of chalcedony, frequently containing green mineral inclusions or brown to black dendrites of iron or manganese oxides.
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.