BJ133 Polished "Black Jade" . rock blocks All reasonably uniform in size

All reasonably uniform in size (roughly 15 - 20 mm diameter}

Weighs 940 grams

Dimensions at widest points approximately 120 mm x 75 mm x 10 mm thick

Dimensions at widest points approximately 180 mm x 95 mm x 12 mm thick

Dimensions at widest points approximately 210 mm x 150 mm x 80 mm thick

BJ133 Polished "Black Jade" . rock blocks All reasonably uniform in sizeBJ133 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.