Polished Tiger Iron slab TI398 polished snakeskin PU134 Purple Chalcedony slab

PU134  Purple Chalcedony slab

VV110  Vivianite nodule cut in half with face polished

White magnesite veins crosscutting

Weighs 743 grams

BJ122 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

Polished Tiger Iron slab TI398 polished snakeskin PU134 Purple Chalcedony slabTI398 Tiger Iron slab, polished on one side. Dimensions at widest points approximately 140 mm x 90 mm x 9 mm thick. Weighs: 337 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.