BJ135 Polished "Black Jade" slab oldest agate in the world DO212 Dendritic Opal slab

DO212  Dendritic Opal slab

Dimensions at widest points approximately 175 mm x 115 mm x 30 mm thick

NJ459   Noreena Jasper slab

All reasonably uniform in size (roughly 20 - 25 mm diameter}

BJ135 Polished "Black Jade" slab oldest agate in the world DO212 Dendritic Opal slabBJ135 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 40 mm x 15 mm thick. It weighs 186 grams. From our mining lease on Ninghan Station in the Midwest region of Western Australia.