Plaza notes
Hard ruleDescription
SD154 Stromatolitic Dolomite rough rock
Translucent
Weighs 180 grams
145 mm x 60 mm x 8
Starry Jasper display specimen
Polished Green Opal slab GRN87 polished noreena SD154 Stromatolitic Dolomite rough rockGRN87 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 110 mm x 80 mm x 10 mm thick Weighs 171 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.
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