Kambaba Jasper is an interesting lapidary material from Madagascar which is actually the petrified remains of stromatolites.  The green/black orbs are replacement of ancient sea life from nearly a billion years ago.  A hard, relatively fracture free material, it polishes easily to make some very striking finished pieces.  The variety of “bulls eye” patterns make a great theme material for a jewelry collection.

Origin:  Madagascar

Dimensions: 4" x 4" and approximately 7.2 mm thick.  Weight = 138 grams. 

Shown wet.  Not polished.  No known significant flaws.