BJ116 Polished "Black Jade" slab. lace agate Porphyry is a general term
Description
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
Weighs 1228 grams
It can be somewhat crumbly when cutting
Weighs 268 grams
red jasper and chatoyant golden tiger eye
BJ116 Polished "Black Jade" slab. lace agate Porphyry is a general termBJ116 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt). A slab, cut and polished on one side . Difficult to photograph due to the mirror black polish.. Dimensions at widest points approximately 180 mm x 75 mm x 8 mm thick. It weighs 246 grams. From our mining lease on Ninghan Station in the Midwest region of Western Australia.
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