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

Weighs 122 grams

Mookaite slab

It weighs 237 grams

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