Polished Tiger Iron slab TI390 Marra Mamba BJ122 Polished "Black Jade" A

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

Weighs 636 grams

Dimensions at widest points approximately 160 mm  x 50 mm wide x 35 mm thick

Dimensions at widest points approximately 170 mm x 85 mm and 45 mm thick

Polished Tiger Iron slab TI390 Marra Mamba BJ122 Polished "Black Jade" ATI390 Tiger Iron slab, polished on one side. Dimensions at widest points approximately 210 mm x 70 mm x 7. 5 mm thick. Weighs: 288 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.