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Ships within 48 hours · Estimated delivery Sep 13 - Sep 18
Weighs 723 grams
OJ194 A slab
MC106 Marillana Conglomerate rough rock
100 mm x 70 mm x 60 mm
cut and polished on one side with a natural back and a cut base to stand as a display specimen
Polished fossil Oncolite slab. ONC112 prehnite Weighs 723 gramsONC112. 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. 145 mm x 105 mm x 8 mm thick. Weighs 285 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
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