Polished Marble Bar Chert slab MB112 oldest agate in the world Weighs 254 grams

Weighs 254 grams

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

BJ140  Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

POP187   Brecciated Pink Opal rough rock

Dimensions at widest points approximately 130 mm x 50  mm x 10

Polished Marble Bar Chert slab MB112 oldest agate in the world Weighs 254 gramsMB112 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