Polished Tiger Iron slab TI263 Tumbled stones Fossil stromatolite polished on one

Fossil stromatolite  polished on one side with natural weathered exterior

Dimensions at widest points approximately 115 mm high x 65 mm x 45 mm thick

PC116 Chalcedony/chrysoprase slab

A beautiful display piece with a cut base

The green colouration is caused by traces of nickel and/or chromium

Polished Tiger Iron slab TI263 Tumbled stones Fossil stromatolite polished on oneTI263 Tiger Iron slab, cut and polished on one side. Dimensions at widest points approximately 125 mm x 50 mm wide x 6 mm thick. Weighs: 88 grams From the Cleaverville Formation, Ord Ranges near Port Hedland, Western Australia. Age is over 3 billion years. Tiger iron is a banded iron formation (BIF) or jaspilite that has alternating layers of black and brown hematite magnetite, red jasper and chatoyant golden tiger eye.