BJ140 Polished "Black Jade" . Tumbled stones DO190 Dendritic Opal slab polished

DO190  Dendritic Opal slab polished on one side

Dimensions at widest points approximately 130 mm x 110 mm x 45 mm thick

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

105 mm x 75 mm x 7 mm thick

Weighs 469 grams

BJ140 Polished "Black Jade" . Tumbled stones DO190 Dendritic Opal slab polishedBJ140 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.