Polished Porphyry . PO 118 snakeskin jasper Dimensions at widest points approximately

Dimensions at widest points approximately 140 mm x 95 mm x 8 mm thick

7 billion years

Large museum piece

Very rare fossil stromatolite

160 mm x 140 mm x 10 mm thick at widest points

Polished Porphyry . PO 118 snakeskin jasper Dimensions at widest points approximatelyPO118. Pink porphyry slab, cut and polished on one side. From our mining claim at Mindoolah, Western Australia. Dimensions at widest points approximately 180 mm x 95 mm x 12 mm thick. Weighs 384 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