Prase rough PRR116 rock block It does occur in the

It does occur in the same geological "Marra Mamba Iron Formation"

Weighs:  645 grams

IRR 134    Fossil stromatolite rough rock

Approximate dimensions at widest points 135 mm  x 45 mm  x 35 mm thick

Dimensions at widest points approximately 105 mm x 65 mm x 35 mm thick

Prase rough PRR116 rock block It does occur in thePRR 116. Dimensions at widest points approximately 170 mm x 95 mm x 70 mm thick. Weighs 1,381 grams. Prase is a chrome rich chert. 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.