Polished Porphyry slab. PO 127 outback jasper 135 mm x 110 mm

135 mm x 110 mm x 10 mm thick and weighs 295 grams

115 mm x 110 mm x 40 mm thick

South America

Dimensions at widest points approximately 80 mm x 40 mm x 20 mm thick

220 mm x 220 mm x 50 mm thick

Polished Porphyry slab. PO 127 outback jasper 135 mm x 110 mmPO127. 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