Polished Green Opal rock GRN102 Marra Mamba Tiger Eye 120 mm x 70 mm

120 mm x 70 mm x 35 mm

Dimensions at widest point approximately 115 mm x 120 mm x 60 mm

Dimensions at widest points are approximately 65 mm x 45 mm x 35 mm

Dimensions at widest points approximately 140 mm x 75 mm x 70 mm thick

Dimensions at widest points approximately 135 mm x 65 mm x 19 mm thick

Polished Green Opal rock GRN102 Marra Mamba Tiger Eye 120 mm x 70 mmGRN102 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 90 mm x 50 mm x 40 mm thick Weighs 340 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.