Polished Pilbara Agate PA281 asperia ashburtonia BJ139 Polished "Black Jade" A

BJ139  Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

Dimensions at widest points approximately 140 mm x 130 mm x 100 mm thick

Weight is 456 grams

Dimensions approximately 140 mm x 50 mm x 37 mm thick

Polished Pilbara Agate PA281 asperia ashburtonia BJ139 Polished "Black Jade" APA281 A matching pair of polished Pilbara Agate halves with natural rough backs. (A single agate cut in half). Dimensions at widest points of each half approx. 70 75 mm x 45 mm x 30 35 mm thick. Weight of both is 322 grams. Studies have shown that these are probably the oldest agates in the world with an age in excess of 2 billion years. They occur in the Maddina Formation in the Pilbara region of Western Australia. From near Nullagine, Pilbara