Polished Porphyry slab. PO 128 Marra Mamba 50 mm x 35 mm

50 mm x 35 mm  x 24 mm

Weighs 118 grams

Dimensions approximately 150 mm x 55 mm x 35 mm thick

240 mm high x 125 mm wide x 60 mm

Dimensions at widest points approximately 180 mm x 125 mm x 11 mm thick

Polished Porphyry slab. PO 128 Marra Mamba 50 mm x 35 mmPO128. Pink porphyry slab, cut and polished on one side. From Mindoolah, Western Australia. Dimensions at widest points approximately 110 mm x 85 mm x 8. 4 mm thick. Weighs 213 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