Polished Marble Bar Chert MB104 rock blocks 100 mm x 60 mm

100 mm x 60 mm x 30 mm

The lime green colouration is caused by the presence of nickel mineralisation

It weighs 300 grams

CH394   Chrysoprase slab polished  on one side

Polished Marble Bar Chert MB104 rock blocks 100 mm x 60 mmMB104 Marble Bar Chert. Cut and polished on one side with a rough, natural back and a cut base to stand as a display specimen ! Dimensions at widest points approximately 140 mm x 70 mm x 40 mm thick. Weighs 850 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