Polished Marble Bar Chert slab MB108 prehnite Dimensions approximately 160 mm x

Dimensions approximately 160 mm x 90 mm x 90 mm thick

It weighs 342 grams

54 pieces of tumble polished Wyloo Amethyst

TI332   Tiger Iron rough rock

Dimensions at widest points of each half approximately 95 mm x 50 mm x 40 - 50 mm thick

Polished Marble Bar Chert slab MB108 prehnite Dimensions approximately 160 mm xMB108 Marble Bar Chert slab polished on one side . Dimensions at widest points approximately 130 mm x 65 mm x 16 mm thick. Weighs 265 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