Types
Features
Monuments
Famous Monuments
Sculpture
Famous Sculptures
Pictographs
Petroglyphs
Figurines
Fossils
Basaltic Kimberlites and Micaceous Kimberlites
Always found as volcanic pipes over deep continental crust, Host rock for Diamond, Is one of the oldest rock, Surfaces are often shiny
Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.
Acidic in nature, Available in lots of colors