Polished Marble Bar Chert MB105 polished magneprase Dimensions at widest points approximately

Dimensions at widest points approximately 125 mm x 120 mm  x 8 mm thick

Dimensions at widest points approximately 150 mm  x 135 mm x 8

180 mm x 130 mm x 50 mm thick

KA148   Kumarina Agate

Dimensions approximately 145 mm x 135 mm x 75 mm thick

Polished Marble Bar Chert MB105 polished magneprase Dimensions at widest points approximatelyMB105 Marble Bar Chert. Cut and polished on one side with a rough, natural back and a cut base to stand as a display specimen ! Dimensions at widest points approximately 140 mm x 120 mm x 50 mm thick. Weighs 1,109 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