Prase rough PRR117 prehnite Dimensions approximately 180 mm x

Dimensions approximately 180 mm x 65 mm x 6 mm thick

The green colouration is caused by traces of nickel and/or chromium

Weighs 345 grams

Interesting reddish colours

Dimensions at widest points approximately 125 mm high x 100 mm  x 35 mm thick

Prase rough PRR117 prehnite Dimensions approximately 180 mm xPRR 117. Dimensions at widest points approximately 110 mm x 75 mm x 50 mm thick. Weighs 373 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.