Polished Marble Bar Chert slab MB130 Chrome chalcedony 120 mm x 100 mm

120 mm x 100 mm x 25 mm thick

AZ108 Azurite sun mineral specimen

240 mm high x 110 mm wide x 80 mm

Weighs 516 grams

Weighs 690 grams

Polished Marble Bar Chert slab MB130 Chrome chalcedony 120 mm x 100 mmMB130 Marble Bar Chert slab polished on one side . Dimensions at widest points approximately 200 mm x 120 mm x 9 mm thick. Weighs 406 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 rocks. From near the town of