Polished fossil Oncolite slab. ONC112 green Weight is 349 grams

Weight  is 349 grams

170 mm x 60 mm x 45 mm

Weight is 504 grams

U112 Unakite rough rock

Weighs 449 grams

Polished fossil Oncolite slab. ONC112 green Weight is 349 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