Polished fossil stromatolite. Alcheringa narrina. ALC142 ashburton agate Dimensions at widest points approximately

Dimensions at widest points approximately 160 mm x 75 mm x 12 mm thick

Weighs 198 grams

Dimensions at widest points are approximately 180 mm x 80 mm x 50 mm

Dimensions approximately 170 mm x 130 mm x 15 mm thick

Unusual colouration caused by natural iron oxide weathering

Polished fossil stromatolite. Alcheringa narrina. ALC142 ashburton agate Dimensions at widest points approximatelyALC142. Fossil stromatolite rough rock, cut and polished on one side, with great weathered rough side. Alcheringa narrina from the Archaean Meentheena Member within the Tumbiana Formation. Age is approx. 2. 7 billion years. From near Nullagine in Western Australia. Approx. 95mm x 45mm x 30mm thick. Weighs 180grams.