Polished Marble Bar Chert slab MB108 Polished dendritic opal Dimensions at widest points approximately

Dimensions at widest points approximately 110 mm  x 55 mm x 6 mm thick

It weighs 480 grams

Dimensions at widest points approximately 210 mm x 150 mm x 18

KA148   Kumarina Agate

Polished Marble Bar Chert slab MB108 Polished dendritic opal Dimensions at widest points approximatelyMB108 Marble Bar Chert slab polished on one side . Dimensions at widest points approximately 130 mm x 65 mm x 16 mm thick. Weighs 265 grams. Marble Bar chert is a finely banded, iron rich silica rock from the Marble Bar Chert Member (Warrawoona Group) of Western Australia. Formed in shallow Archean seas, it dates to the Paleoarchean (~3. 46 billion years old), making it one of the Earths oldest well preserved sedimentary rocks. From near the town of