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Dimensions at widest points approximately 290 mm x 170 mm x 9 mm thick
CLT123 Tumble polished Crazy Lace Agate from Western Australia
It weighs 174 grams
CO109 DeGrussa copper ore slab
Polished fossil Oncolite. ONC109 black conglomerate Dimensions at widest points approximatelyONC109. 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. 150 mm x 65 mm x 6. 5 mm thick. Weighs 117 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