Polished Tiger Iron slab TI340 brecciated 45 mm x 30 mm

45 mm x 30 mm x 25 mm

Weighs 833 grams

175 mm x 100 mm x 9 mm thick

It probably grew in shallow water conditions with intermittent subaerial exposure

MN142  Magneprase slab

Polished Tiger Iron slab TI340 brecciated 45 mm x 30 mmTI340 Tiger Iron slab, polished on one side. Dimensions at widest points approximately 200 mm x 105 mm x 9 mm thick. Weighs: 518 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.