BJ137 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt). A slab, cut and polished on one side .
Difficult to photograph due to the mirror black polish..
Dimensions at widest points approximately 160 mm x 70 mm x 11 mm thick.
It weighs 251 grams.
From our mining lease on Ninghan Station in the Midwest region of Western Australia.
