Polished Bauxite slab BAU122 Irregully formation A domal stromatolite from the

A domal stromatolite from the Proterozoic "Irregully Formation"

The amphibolite

Dimensions approximately 380 mm x 230 mm x 21 mm thick

DOT102  Tumble polished Dendritic Opal

Dimensions at widest points approximately 85 mm x 65 mm x 20 mm thick

Polished Bauxite slab BAU122 Irregully formation A domal stromatolite from theBAU122. Bauxite (laterite) slab, cut and polished on one side. Dimensions at widest points approximately 120 mm x 100 mm x 14 mm thick. Weighs 366 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.