Polished fossil stromatolite. Alcheringa narrina. ALC161 polished noreena Dimensions at widest points approximately

Dimensions at widest points approximately 260 mm x 170 mm x 8 mm thick

145 mm x 90 mm x 9 mm

Dimensions at widest points approximately 180 mm  x 110 mm x 9 mm thick

PU120  Purple Chalcedony rough rock

140 mm x 85 mm x 80 mm

Polished fossil stromatolite. Alcheringa narrina. ALC161 polished noreena Dimensions at widest points approximatelyALC160 Fossil stromatolite , polished on one side with natural weathered exterior on rear. Alcheringa narrina from the Archaean Meentheena Member within the Tumbiana Formation. Age is approx. 2. 7 billion years. From near Nullagine in Western Australia. Dimensions at widest points approx. 135 mm x 80 mm x 40 mm thick. Weighs 584 grams.