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PRR 125.
Dimensions at widest points approximately 160 mm x 140 mm x 80 mm thick.
Weighs 2,151 grams.
Red in this piece !
Prase is a chrome-rich chert. Also called Dragon Stone.
The green colour usually derives from minor mineral content, most commonly the green chromiferous muscovite mica, fuchsite.
There are numerous Prase deposits in the Pilbara region of Western Australia.