Polished Porphyry slab. PO 130 Kumarina Agate 285 mm x 90 mm

285 mm x 90 mm x 10 mm thick

RFJ134  Rhyolite (Rainforest Jasper) rough rock

DOT101  Tumble polished Dendritic Opal

POP187   Brecciated Pink Opal rough rock

Dimensions at widest points approximately 150 mm x 80 mm and 6

Polished Porphyry slab. PO 130 Kumarina Agate 285 mm x 90 mmPO130. Pink porphyry slab, cut and polished on one side. From Mindoolah, Western Australia. Dimensions at widest points approximately 270 mm x 150 mm x 8 mm thick. Weighs 711 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