Polished Green Opal slab GRN105 Rhodonite Dimensions approximately 100 mm x

Dimensions approximately 100 mm x 65 mm x 16 mm thick

TIR146 Tiger Iron rough rock

Dimensions at widest points approximately 380 mm x 110  mm with slightly tapering thickness of 12 - 14 mm

Weight 972 grams

From  Yerilla

Polished Green Opal slab GRN105 Rhodonite Dimensions approximately 100 mm xGRN105 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 140 mm x 80 mm x 12. 5 mm thick Weighs 224 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..