Store is closed until mid August as we are away mining.
PO123. 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 clinozoisite has replaced but retained the shape of plagioclase feldspar crystals.
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