Polished Marble Bar Chert MB106 outback jasper BJ118 Polished "Black Jade" A

BJ118  Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

Weight 146 grams

Fossil stromatolite slab polished on one side

Dimensions approximately 130 mm x 100 mm x 50 mm thick

Dimensions at widest points approximately 115 mm x 100 mm

Polished Marble Bar Chert MB106 outback jasper BJ118 Polished "Black Jade" AMB106 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 160 mm x 120 mm x 45 mm thick. Weighs 1,607 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