Polished Porphyry slab. PO 128 polished jasper GRN81 Green Opal & Magnesite

GRN81  Green Opal & Magnesite rough rock

The "Carawine Dolomite" is a geological formation that occurs in numerous isolated areas in the eastern part of the Hamersley Basin in the Pilbara region of Western Australia

5 mm thick

HEM128  A mix of specular and reticulated Hematite cut and polished on one side with a natural rough back

Dimensions at widest points approximately 195 mm x 90 mm x 9

Polished Porphyry slab. PO 128 polished jasper GRN81 Green Opal & MagnesitePO128. Pink porphyry slab, cut and polished on one side. From Mindoolah, Western Australia. Dimensions at widest points approximately 110 mm x 85 mm x 8. 4 mm thick. Weighs 213 grams. 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. The porphyry pictured here has pinkish coloured clinozoisite crystals set in a ground mass of dolerite. The