Polished Marble Bar Chert MB116 Rhodonite Dimensions approximately 100 mm x

Dimensions approximately 100 mm x 50 mm x 11 mm thick

GREEN76  Green Opal & Magnesite rough rock

AZ135  Azurite sun mineral specimen

105 mm x 55 mm  x 9 mm

Polished Marble Bar Chert MB116 Rhodonite Dimensions approximately 100 mm xMB116 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 110 mm x 90 mm x 45 mm thick. Weighs 831 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