Polished Green Opal rock GRN103 Rhodonite From Koolyanobbing

From Koolyanobbing

KA145   Kumarina Agate

110 mm x 80 mm x 30 mm

Approximate dimensions at widest points 150 mm  x 100 mm  x 645 mm thick

CH412  Chrysoprase cut and polished  on one side with a rough

Polished Green Opal rock GRN103 Rhodonite From KoolyanobbingGRN103 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 170 mm x 70 mm x 80 mm thick Weighs 763 grams Green Opal occurs at a location south of Kalgoorlie in the Eastern Goldfields of Western Australia. The green colouration is caused by traces of nickel and or chromium. Sometimes it exhibits striking contrasting veins of magnesite.