Polished fossil stromatolite. Alcheringa narrina. ALC161 Noreena Dimensions at widest point approximately

Dimensions at widest point approximately 155 mm x 95 mm x 9

Weighs 670 grams

DOT104  Tumble polished Dendritic Opal

HEM144  Hematite geode half

Oncolite is a limestone composed largely of oncoids—rounded

Polished fossil stromatolite. Alcheringa narrina. ALC161 Noreena Dimensions at widest point 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.