Polished Porphyry PO 129 Rough rock Dimensions at widest points approximately

Dimensions at widest points approximately 120 mm x 85 mm x 85 mm thick

It weighs 789 grams

Dimensions at widest points approximately 140 mm x 105 mm x 12 mm thick

Weighs:  4

It occurs in the Proterozoic Mount Bruce Supergroup which is part of the Fortescue Group with an age of approx

Polished Porphyry PO 129 Rough rock Dimensions at widest points approximatelyPO129. Pink porphyry rock, cut and polished on one side with a rough, natural back and a cut base to sit as a display specimen. From Mindoolah, Western Australia. Dimensions at widest points approximately 110 mm x 90 mm x 45 mm thick. Weighs 620 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