PEGMATITE


Pegmatite is a very course grained plutonic igneous rock. The grain size must be 20mm or more. The appearance of a pegmatite is distinct as the large crystals embedded within the host rock often have a strong contrast in colors and textures.

Pegmatites may contain gemstones such as corundum (ruby and sapphire), tourmalines (such as elbaite and schorl), beryls (such as emerald and aquamarine), and topaz.



See Steve's video interview about asteroid capture at Moonandback:
Part 1
Part 2
Part 3
 


Copyright ©1995-2023 by Amethyst Galleries, Inc.