Polished Tiger Iron slab TI368 chatoyance 170 mm x 70 mm

170 mm x 70 mm  x 10

Tumble polished Chrysoprase

Dimensions at widest points approximately 115 mm x 105 mm x 90 mm thick

The porphyry pictured here has pinkish coloured clinozoisite crystals set in a ground mass of dolerite

Dimensions at widest points approximately 110 mm  x 100 mm wide x 6

Polished Tiger Iron slab TI368 chatoyance 170 mm x 70 mmTI368 Tiger Iron slab, polished on one side. Dimensions at widest points approximately 290 mm x 170 mm x 9 mm thick. Weighs: 1,182 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.