Polished fossil Oncolite slab. ONC113 Noreena POP162 Pink Opal slab

POP162   Pink Opal slab

Dimensions at widest points approximately 120 mm x 70 mm x 30 mm thick

170 mm high x 120 mm wide x 75 mm

sunlit waters with gentle movement

Dimensions at widest points approximately 75 mm

Polished fossil Oncolite slab. ONC113 Noreena POP162 Pink Opal slabONC113. 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. 165 mm x 160 mm x 9 mm thick. Weighs 449 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