BJ135 Polished "Black Jade" slab oldest agate in the world Large piece covered in azurite

Large piece covered in azurite

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

PC129 Chalcedony slab

It weighs 224 grams

110 mm x 65 mm x 35 - 50 mm thick

BJ135 Polished "Black Jade" slab oldest agate in the world Large piece covered in azuriteBJ135 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.