Polished fossil Oncolite. ONC110 striped jasper 115 mm x 60 mm

115 mm x 60 mm x 40 mm thick

100 mm x 75 mm x 13 mm thick & weighs 233 grams

RH265  A slab

Dimensions at widest points are approximately 130 mm x 90 mm x 40 mm

MK465   Mookaite

Polished fossil Oncolite. ONC110 striped jasper 115 mm x 60 mmONC110. 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