Polished Green Opal rock GRN114 picture jasper Dimensions at widest points approximately

Dimensions at widest points approximately 130 mm x 35 mm x 10 mm  thick

Chevron Amethyst

Dimensions at widest points approximately 120 mm x 70 mm x 55 mm thick

125 mm x 80 mm x 70 mm

Polished Green Opal rock GRN114 picture jasper Dimensions at widest points approximatelyGRN114 Green Opal rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 110 mm x 90 mm x 50 mm thick Weighs 574 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.