Polished Lime Magnesite specimen. MAP215 Citron chrysoprase BJ120 Polished "Black Jade" A

BJ120 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

CH434  Chrysoprase  slab polished  on one side

Dimensions at widest points approximately 95 mm  x 70 mm x 7 mm thick

140 mm x 140 mm  x 11

Polished Lime Magnesite specimen. MAP215 Citron chrysoprase BJ120 Polished "Black Jade" AMAP215. Magnesite (Lemon chrysoprase) rough rock, cut and polished on one side with a natural back. Half of a complete nodule ! Dimensions at widest points approximately 130 mm x 100 mm x 60 mm thick. Weighs 1,109 grams. The subtle lime green colouration is caused by the presence of nickel mineralisation. From north of Kalgoorlie , Western Australia.