Polished Marble Bar Chert slab MB130 Chrome chalcedony Weighs 516 grams

Weighs 516 grams

Dimensions at widest points approximately 140 mm x 100 mm x 50 mm thick

Weighs 690 grams

AZ108 Azurite sun mineral specimen

Dimensions at widest points approximately 140 mm x 100 mm x 10 mm thick

Polished Marble Bar Chert slab MB130 Chrome chalcedony Weighs 516 gramsMB130 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