Polished Pilbara Agate PA283 lepidolite BJ129 Polished "Black Jade" A

BJ129  Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

Approximate dimensions at widest points 120 mm long  x 100 mm  x 30 mm thick

150 mm x 90 mm x 7 mm thick

90 mm x 80 mm x 30 mm thick

It weighs 421 grams

Polished Pilbara Agate PA283 lepidolite BJ129 Polished "Black Jade" APA283 Pilbara Agate , cut and polished on one side with a rough, natural back. Dimensions at widest points are approximately 110 mm x 60 mm x 60 mm. thick. Weighs 629 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 region, Western Australia.