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

Weighs 309 grams

IRR 131    Fossil stromatolite slab

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