BJ140 Polished "Black Jade" . Tumbled stones It contains numerous occurrences of

It contains numerous occurrences of stromatolites and oncolites with an age of between 2

Weighs 469 grams

175 mm x 100 mm x 9 mm thick

Dimensions at widest points approximately 150 mm x 75 mm x 85 mm thick

310 mm x 115 mm  x 11 mm

BJ140 Polished "Black Jade" . Tumbled stones It contains numerous occurrences ofBJ140 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt). A rough rock, cut and polished on one side with a natural back and flat base to stand on. Difficult to photograph due to the mirror black polish.. Dimensions at widest points approximately 145 mm x 70 mm x 40 mm thick. It weighs 649 grams. From our mining lease on Ninghan Station in the Midwest region of Western Australia.