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

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

Oncolite is a limestone composed largely of oncoids—rounded

CH438  Chrysoprase  slab polished  on one side

DOT104  Tumble polished Dendritic Opal

Weight 985 grams

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.