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CC155 Chrome chalcedony slab
SD155 Stromatolitic Dolomite rough rock
TI295 Tiger Iron rough rock
From the Jeerinah Formation in the Hamersley Ranges
Polished Porphyry PO 129 Rough rock CC155 Chrome chalcedony slabPO129. 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
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