Polished Tiger Iron slab TI322 purple chalcedony Dimensions at widest points approximately

Dimensions at widest points approximately 110 mm x 60 mm x 50 mm thick

SPF123   Fossil stromatolite  polished on one side with natural weathered exterior

Dimensions at widest points approximately 160 mm x 80 mm x 65 mm thick

Face is approximately 90mm x 50mm and  9mm thick

Approximate dimensions at widest points 100 mm  x 70 mm  x 55 mm thick

Polished Tiger Iron slab TI322 purple chalcedony Dimensions at widest points approximatelyTI322 Tiger Iron slab, polished on one side. Dimensions at widest points approximately 95 mm x 75 mm x 8. 5 mm thick. Weighs: 157 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.