Polished fossil Oncolite. ONC110 striped jasper OG201 Polished orbicular granite slab

OG201   Polished orbicular granite slab

Dimensions at widest points approximately 170 mm x 145 mm x 13

It weighs 446 grams

RH265  A slab

naturally weathered back and a cut base to stand on

Polished fossil Oncolite. ONC110 striped jasper OG201 Polished orbicular granite slabONC110. Fossil Oncolite polished slab. From the Miocene "Trealla Limestone" north of Carnarvon, Western Australia . Age is approx. 15 million years. Dimensions at widest points approx. 125 mm x 70 mm x 8 mm thick. Weighs 172 grams. Oncolite is a limestone composed largely of oncoidsrounded, coated grains that grow as thin layers of lime mud accumulate around a tiny nucleus (such as a sand grain or shell fragment) under microbial influence. Formed in