BJ138 Polished "Black Jade" slab polished rock Dimensions at widest points approximately

Dimensions at widest points approximately 170 mm x 110 mm x 9 mm thick

a thick slab

Thick enough to cut more slices or leave intact as a display specimen

Fossil stromatolite rough rock

Pilbaria sp

BJ138 Polished "Black Jade" slab polished rock Dimensions at widest points approximatelyBJ138 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 170 mm x 45 mm x 15. 5 mm thick. It weighs 206 grams. From our mining lease on Ninghan Station in the Midwest region of Western Australia.