Basaltic Kimberlites and Micaceous Kimberlites
Granite Pegmatite, Gabbro Pegmatite and Diorite Pegmatite
Always found as volcanic pipes over deep continental crust, Host rock for Diamond, Is one of the oldest rock, Surfaces are often shiny
Generally rough to touch, Is one of the oldest rock, Source of corundum, tourmalines, beryls and topaz