Polished Porphyry PO 129 crystoprase Green Opal occurs at a

Green Opal occurs at a location south of Kalgoorlie in the Eastern Goldfields of Western Australia

It weighs 237 grams

Weighs 122 grams

Gold mineralisation occurs within the Beaton's Creek conglomerate

Dimensions approximately 115 mm x 55 mm x 30 mm deep

Polished Porphyry PO 129 crystoprase Green Opal occurs at aPO129. 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