Polished Marble Bar Chert MB115 sskin Weight of each piece is

Weight of each piece is between 49 and 55 grams

140 mm x 100 mm x 50 mm thick

From near Norseman

It weighs 117 grams

Polished Marble Bar Chert MB115 sskin Weight of each piece isMB115 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 150 mm x 110 mm x 50 mm thick. Weighs 1,151 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