Polished Magnesite slab. MAP197 polished magneprase 140 mm x 90 mm

140 mm x 90 mm x 8 mm thick

Porphyry is a general term that is used rather loosely for  igneous rocks which contain relatively large isolated crystals set in a fine-grained groundmass

This very unusual piece has much more than just pink colouration

Dimensions approximately 150 mm x 110 mm x 7 mm thick

near Rockhampton in Queensland

Polished Magnesite slab. MAP197 polished magneprase 140 mm x 90 mmMAP197. Magnesite (Lemon chrysoprase) slab polished on one side. The lime green colouration is caused by the presence of nickel mineralisation. Dimensions at widest points approximately 135 mm x 125 mm x 8. 5 mm thick. Weighs 332 grams. From north of Kalgoorlie, Western Australia.