Pseudomorph. Goethite after Marcasite PS113 purple Approximate dimensions at widest points

Approximate dimensions at widest points 145 mm  x 110 mm  x 33 mm thick

Dimensions at widest points approximately 180 mm x 90 mm x 11 mm thick

155 mm x 70 mm x 30 mm thick

These rare stromatolites are from the “Windidda Formation”

Weighs 406 grams

Pseudomorph. Goethite after Marcasite PS113 purple Approximate dimensions at widest pointsPS113 Pseudomorph. Goethite after Marcasite These interesting mineral oddities occur in the banks of the Gascoyne River about 130 km east of Carnarvon, Western Australia. Crystalline cylindrical mass with spike on both ends ! Dimensions at widest points approximately 150 mm x 30 mm . diameter Weighs 256 grams