Polished Porphyry . PO 123 Polished slab. IRR120 Fossil stromatolite slab polished

IRR120  Fossil stromatolite slab polished on one side

Weight  is 405 grams

It can be somewhat crumbly when cutting

Dimensions approximately 170mm x 100mm x 7mm thick

210 mm x 120 mm x 60 mm thick

Polished Porphyry . PO 123 Polished slab. IRR120 Fossil stromatolite slab polishedPO123. Pink porphyry slab, cut and polished on one side. From Mindoolah, Western Australia. Dimensions at widest points approximately 140 mm x 80 mm x 8. 5 mm thick. Weighs 188 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