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Polished Porphyry . PO 117

Regular price $48.00

PO117.  Pink porphyry slab, cut and polished  on one side.

From our mining claim at Mindoolah, Western Australia.

Dimensions at widest points approximately 190 mm x 110 mm x 11 mm thick.

Weighs 454 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 clinozoisite has replaced but retained the shape of plagioclase feldspar crystals.

 


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