Polished fossil stromatolite. Alcheringa narrina. ALC159 chalcedony Dimensions at widest points approximately

Dimensions at widest points approximately 140 mm x 115 mm x 50 mm thick

Dimensions at widest points approximately 130 mm x  110 mm x 27 mm thick

65 mm x 45 mm x 20 mm

Weighs 349 grams

Polished fossil stromatolite. Alcheringa narrina. ALC159 chalcedony Dimensions at widest points approximatelyALC159 Fossil stromatolite , polished on one side with natural weathered exterior on rear. Small pyrite cubes interspersed ! 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. 120 mm x 85 mm x 50 mm thick. Weighs 741 grams.