Polished Porphyry . PO 122 pilbara agate It often contain layers and

It often contain layers and nodules of red chert

EPI63   Epidote

Weighs 636 grams

Weighs 300grams

SPF126   Fossil stromatolite  polished on one side with natural weathered exterior

Polished Porphyry . PO 122 pilbara agate It often contain layers andPO122. Pink porphyry slab, cut and polished on one side. From Mindoolah, Western Australia. Dimensions at widest points approximately 290 mm x 165 mm x 10 mm thick. Weighs 898 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