Polished Porphyry slab. PO 127 cla RH269 A slab

RH269  A slab

Dimensions at widest points of each half approximately 110 mm x 70 mm x 40 mm thick

From the "Mount Roe Basalt" near Whim Creek

Dimensions approximately 90 mm x 80 mm x 75 mm thick

From Milgun Station

Polished Porphyry slab. PO 127 cla RH269 A slabPO127. Pink porphyry slab, cut and polished on one side. From Mindoolah, Western Australia. Dimensions at widest points approximately 195 mm x 120 mm x 9. 4 mm thick. Weighs 469 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