Polished Marble Bar Chert MB117 dendrites CO120 DeGrussa copper ore slab

CO120  DeGrussa copper ore slab

Dimensions at widest points approximately 90 mm x 50 mm x 40 mm thick

Dimensions at widest points approximately 140 mm x 85 mm x 75 mm thick

Dimensions at widest points approximately 145 mm x 95 mm x 10

Dimensions at widest points approximately 155 mm x 95 mm x 50 mm thick

Polished Marble Bar Chert MB117 dendrites CO120 DeGrussa copper ore slabMB117 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 210 mm x 140 mm x 100 mm thick. Weighs 3,604 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