Blue Aura Quartz Aqua aura is a natural crystal that has been coated with gold fumes. It is created in a vacuum chamber from quartz crystals and gold vapor by a process known as vapour deposition. The quartz is heated to 871 °C °F) i.
Calcite with quartz from Huanggang Mine, Inner Mongolia, China. The pictured specimen is tall. The quartz at the center of the stacked calcite disks is better exposed in some of the specimens that they have at the show. Photo credit: Jeffrey A.