Polished Porphyry slab. PO 128 polished jasper 5 mm thick

5 mm thick

115 mm x 50 mm x 15 mm thick at widest points

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

145 mm x 100 mm x 8

Weighs:  588 grams

Polished Porphyry slab. PO 128 polished jasper 5 mm thickPO128. 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