Polished Marble Bar Chert slab MB112 oldest agate in the world 39 slabs weighing just over

39 slabs weighing just over 5 kgs

Dimensions at widest points approximately 110 mm x  90 mm x 45 mm thick

CO123  DeGrussa copper ore slab

Approximate dimensions at widest points 140 mm  x 60 mm  x 11 mm thick

POP187   Brecciated Pink Opal rough rock

Polished Marble Bar Chert slab MB112 oldest agate in the world 39 slabs weighing just overMB112 Marble Bar Chert slab polished on one side . Dimensions at widest points approximately 120 mm x 105 mm x 7 mm thick. Weighs 195 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