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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
Small oxidised cubic pyrite inclusions
Weighs 903 grams
NJT126 Tumble polished Noreena Jasper from Western Australia
Weighs 205 grams
Polished Porphyry slab. PO 127 Green Opal Porphyry is a general termPO127. 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
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