Polished Lime Magnesite . MAP222 microbialite BJ132 Polished "Black Jade" A

BJ132 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

Dimensions at widest points approximately 155 mm x 110 mm x 11 mm thick

Dimensions at widest points approximately 70 mm x 45 mm x 30 mm thick

Dimensions at widest point approximately 150 mm x 100 mm x 9

Weighs 127 grams

Polished Lime Magnesite . MAP222 microbialite BJ132 Polished "Black Jade" AMAP222. Magnesite (Lemon chrysoprase) rough rock, cut and polished on one side with a natural back. Dimensions at widest points approximately 160 mm x 50 mm x 40 mm thick. Weighs 563 grams. The subtle lime green colouration is caused by the presence of nickel mineralisation. From north of Kalgoorlie , Western Australia.