Polished Marble Bar Chert slab MB121 purple lepidolite tumbling or specimens

tumbling or specimens

Dimensions at widest points approximately 150 mm x 75 mm x 65 mm thick

Dimensions at widest points approximately 205 mm x 95 mm x 50 mm thick

Pilbaria perplexa from the Proterozoic "Duck Creek Dolomite"

Weight is 290 grams

Polished Marble Bar Chert slab MB121 purple lepidolite tumbling or specimensMB121 Marble Bar Chert slab polished on one side . Dimensions at widest points approximately 100 mm x 100 mm x 8 mm thick. Weighs 196 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