Polished Marble Bar Chert MB103 chrysoprase Dimensions at widest points approximately

Dimensions at widest points approximately 125 mm x 115 mm x 35 mm thick

Weighs 2 kgs

Weighs 420 grams

From Malbunka copper mine in Northern Territory

MK551   Mookaite

Polished Marble Bar Chert MB103 chrysoprase Dimensions at widest points approximatelyMB103 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