Polished fossil Oncolite. ONC110 Orbicular Granite POP195 Brecciated Pink Opal slab

POP195   Brecciated Pink Opal slab

Dimensions at widest points approximately 160 mm x 90 mm x 50 mm thick

Weighs 883 grams

Weighs 306 grams

It weighs 532 grams

Polished fossil Oncolite. ONC110 Orbicular Granite POP195 Brecciated Pink Opal slabONC110. 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