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CLA257 Australian Crazy Lace Agate slab
Weight is 309 grams
B229 Black Jasper Conglomerate slab
It weighs 271 grams
It weighs 476 grams
Polished fossil Oncolite slab. ONC114 dendrites CLA257 Australian Crazy Lace AgateONC114. 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 100 mm x 7. 5 mm thick. Weighs 241 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