Polished Porphyry slab. PO 130 Kumarina Agate RFJ134 Rhyolite (Rainforest Jasper) rough

RFJ134  Rhyolite (Rainforest Jasper) rough rock

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

285 mm x 90 mm x 10 mm thick

It weigh 295 grams

Weighs 366 grams

Polished Porphyry slab. PO 130 Kumarina Agate RFJ134 Rhyolite (Rainforest Jasper) roughPO130. 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