Polished Porphyry . PO 123 Polished slab. Dimensions at widest points approximately

Dimensions at widest points approximately 370 mm x 110  mm with slightly tapering thickness of 11 - 14 mm

IRR120  Fossil stromatolite slab polished on one side

also known as Ashburton Agate

Dimensions approximately 170mm x 100mm x 7mm thick

Polished Porphyry . PO 123 Polished slab. Dimensions at widest points approximatelyPO123. 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