BJ142 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 145 mm x 40 mm x 7 - 9 mm thick.
It weighs 134 grams.
From our mining lease on Ninghan Station in the Midwest region of Western Australia.
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