BJ133 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt). A rough rock, cut and polished on one side.
Difficult to photograph due to the mirror black polish..
Dimensions at widest points approximately 185 mm x 45 mm x 45 mm thick.
It weighs 573 grams.
From our mining lease on Ninghan Station in the Midwest region of Western Australia.
