Polished Tiger Iron TI381 ashburton agate BJ120 Polished "Black Jade" A

BJ120 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

TI370  Tiger Iron slab

Dimensions at widest points approximately 130 mm x 35 mm x 10 mm  thick

Dimensions approximately 130 mm x 70 mm x 8 mm thick

Polished Tiger Iron TI381 ashburton agate BJ120 Polished "Black Jade" ATI381 Tiger Iron rough rock, cut and polished on one side with a rough natural back. Dimensions at widest points approximately 180 mm x 75 mm x 40 mm thick. Weighs: 856 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.