Polished Tiger Iron slab TI283 rare DO188 Wanong Dendritic Opal slab

DO188  Wanong Dendritic Opal slab

Weighs 156 grams

Dimensions at widest points approximately 130 mm x 85  x 25 mm thick

Dimensions at widest points approximately 370 mm x 110  mm with slightly tapering thickness of 11 - 14 mm

Polished Tiger Iron slab TI283 rare DO188 Wanong Dendritic Opal slabTI283 Tiger Iron slab, polished on one side . Dimensions at widest points approximately 140 mm x 100 mm wide 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.