Polished Tiger Iron slab TI388 Citron chrysoprase 85 mm x 90 mm

85 mm x 90 mm x 30 - 35 mm thick

DO170  Dendritic Opal rough rock

Dimensions at widest points approximately 140 mm x 130 mm x 80 mm thick

An unusual feature of some pieces are septarian structures with black colouration

MC119 Marillana Conglomerate slab

Polished Tiger Iron slab TI388 Citron chrysoprase 85 mm x 90 mmTI388 Tiger Iron slab, polished on one side. Dimensions at widest points approximately 150 mm x 100 mm x 7 mm thick. Weighs: 234 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.