Polished Porphyry slab. PO 127 outback jasper South America

South America

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

Dimensions approximately 145 mm x 105 mm x 14

220 mm x 220 mm x 50 mm thick

115 mm x 95 mm x 8

Polished Porphyry slab. PO 127 outback jasper South AmericaPO127. 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