Polished Marble Bar Chert MB124 Nickeloan magnesite 230 mm x 170 mm

230 mm x 170 mm x 11 mm thick

AZ166  Azurite sun mineral specimen

RH308  Rhodonite rock

Dimensions at widest points approximately 180 mm x 145 mm x 13 mm thick

DOT102  Tumble polished Dendritic Opal

Polished Marble Bar Chert MB124 Nickeloan magnesite 230 mm x 170 mmMB124 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 225 mm x 130 mm x 65 mm thick. Weighs 3,237 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