Polished Porphyry slab. PO 127 outback jasper Dimensions approximately 145 mm x

Dimensions approximately 145 mm x 105 mm x 14

115 mm x 110 mm x 40 mm thick

Dimensions at widest points approximately 260 mm x 150 mm and 10 mm thick

South America

115 mm x 95 mm x 8

Polished Porphyry slab. PO 127 outback jasper Dimensions approximately 145 mm xPO127. Pink porphyry slab, cut and polished on one side. From Mindoolah, Western Australia. Dimensions at widest points approximately 195 mm x 120 mm x 9. 4 mm thick. Weighs 469 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