Polished Porphyry . PO 123 Green Opal 210 mm x 160 mm

210 mm x 160 mm x 12 mm thick

Dimensions at widest points approximately 180 mm x 95 mm x 12 mm thick

DO153 Dendritic Opal rough rock

It was collected many years ago from a large open cut gold mine at Reedys near Cue in Western Australia

From the Cleaverville Formation

Polished Porphyry . PO 123 Green Opal 210 mm x 160 mmPO123. Pink porphyry slab, cut and polished on one side. From Mindoolah, Western Australia. Dimensions at widest points approximately 140 mm x 80 mm x 8. 5 mm thick. Weighs 188 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