BJ124 Polished "Black Jade" slab. atlantisite DO195 Dendritic Opal rough rock

DO195  Dendritic Opal rough rock

Weighs 987 grams

Dimensions at widest points approximately 150 mm  x 95 mm x 12 mm thick

It often contain layers and nodules of red chert

Dimensions at widest points approximately 125 mm x 35 mm x 40 mm thick

BJ124 Polished "Black Jade" slab. atlantisite DO195 Dendritic Opal rough rockBJ124 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt). A slab, cut and polished on one side . Geologically interesting with a cross cutting quartz vein ! Difficult to photograph due to the mirror black polish.. Dimensions at widest points approximately 185 mm x 125 mm x 12. 5 mm thick. It weighs 599 grams. From our mining lease on Ninghan Station in the Midwest region of Western Australia.