Granite Pegmatite, Gabbro Pegmatite and Diorite Pegmatite
Borolanite and Litchfieldite
Generally rough to touch, Is one of the oldest rock, Source of corundum, tourmalines, beryls and topaz
Application of acids on the surface causes cloudy frosting, Available in Lots of Colors and Patterns, Dissolves in hydrochloric acid, Is one of the oldest rock