Polished Bauxite BAU137 purple chalcedony Dimensions approximately 120 mm x

Dimensions approximately 120 mm x 70 mm x 8 mm thick

KA143   Kumarina Agate

Polished petrified wood

Dimensions at widest points approximately 150 mm x 100 mm x 870 mm thick

Dimensions at widest points approximately 210 mm x 125 mm x 11  mm thick

Polished Bauxite BAU137 purple chalcedony Dimensions approximately 120 mm xBAU137. Bauxite (laterite) rough rock, cut and polished on one side. Dimensions at widest points approximately 120 mm x 95 mm x 65 mm thick. Weighs 868 grams. Bauxite is the main raw material used in the commercial production of aluminium. Large reserves of this stone occur in Western Australia. This specimen is from east of the Darling Ranges just outside the city of Perth.