Polished Marble Bar Chert MB103 chrysoprase From Malbunka copper mine in

From Malbunka copper mine in Northern Territory

Weighs 345 grams

MK551   Mookaite

Weighs 266 grams

130 mm x 115 mm  x 8

Polished Marble Bar Chert MB103 chrysoprase From Malbunka copper mine inMB103 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 160 mm x 100 mm x 75 mm thick. Weighs 1,205 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