Polished fossil Oncolite. ONC110 Tiger Eye CLA268 Australian Crazy Lace Agate

CLA268   Australian Crazy Lace Agate rough rock

Total weight 375 grams

140 mm x 90 mm  x 8 mm

85 mm x 60 mm x 25 mm thick

175 mm x 100 mm x 9 mm thick

Polished fossil Oncolite. ONC110 Tiger Eye CLA268 Australian Crazy Lace AgateONC110. 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