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DOT103 Tumble polished Dendritic Opal
Weighs: 66 grams
Under shortwave UV light it fluoresces a deep red colour
Weighs 657 grams
Dimensions at widest points approximately 90 mm x 75 mm x 9 mm thick
Polished fossil Oncolite. ONC110 peanut DOT103 Tumble polished Dendritic OpalONC110. 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
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