Titanium Aura Amethyst Cluster
Nice hunk of beautifully colorful titanium aura coated amethyst.
Length: 5 inches
Width: 3 inches
The amethyst stone is heated to 871 °C (1600 °F) in a vacuum, and then gold vapor is added to the chamber. The gold atoms fuse to the crystal's surface, which gives the crystal an iridescent metallic sheen.