Polished Tiger Iron slab TI340 brecciated It probably grew in shallow

It probably grew in shallow water conditions with intermittent subaerial exposure

235 mm x 200 mm x 100 mm

45 mm x 30 mm x 25 mm

MN142  Magneprase slab

Weighs 173 grams

Polished Tiger Iron slab TI340 brecciated It probably grew in shallowTI340 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.