Polished Porphyry slab. PO 130 Rhodonite Dimensions at widest points approximately

Dimensions at widest points approximately 150 mm x 160  mm x 10 mm thick

Dimensions at widest points approximately 120 mm  x 55 mm wide x 8 mm thick

Measures approximately 220mm x 120mm and  7mm thick

from the Proterozoic "Duck Creek Dolomite"

Chrysoprase on one end

Polished Porphyry slab. PO 130 Rhodonite Dimensions at widest points approximatelyPO130. 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