BJ123 Polished "Black Jade" . alcheringa narrina CH458 Chrysoprase rough rock

CH458  Chrysoprase rough rock

Dimensions at widest points approximately 145 mm x 80 mm and 9 mm thick

PU129  Purple Chalcedony slab

Dimensions approximately 65mm x 60mm x 9mm thick

Dimensions at widest points approximately 185 mm x  165 mm x 55 mm thick

BJ123 Polished "Black Jade" . alcheringa narrina CH458 Chrysoprase rough rockBJ123 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt). A rough rock, cut and polished on one side with a cut base to stand as a display specimen ! Geologically interesting with a cross cutting quartz vein ! Difficult to photograph due to the mirror black polish.. Dimensions at widest points approximately 170 mm x 110 mm x 65 mm thick. It weighs 1,619 grams. From our mining lease on Ninghan Station in the Midwest