Polished fossil stromatolite. Asperia ashburtonia. ASP150 stand-up Green Opal occurs at a

Green Opal occurs at a location south of Kalgoorlie in the Eastern Goldfields of Western Australia

70 mm x 45 mm  x 30 mm

All reasonably uniform in size (roughly 20 - 30 mm diameter} A bulk assortment

It weigh 295 grams

Polished fossil stromatolite. Asperia ashburtonia. ASP150 stand-up Green Opal occurs at aASP150. Fossil stromatolite . Cut and polished on one side with natural rough exterior on rear. Asperia ashburtonia from the Proterozoic "Duck Creek Dolomite". Age is approx. 2 billion years. From near Paraburdoo in Western Australia. Dimensions at widest points approx. 280 mm x 110 mm x 30 mm thick. It weighs 1,798 grams.