Polished Tiger Iron slab TI388 Citron chrysoprase DO170 Dendritic Opal rough rock

DO170  Dendritic Opal rough rock

MC119 Marillana Conglomerate slab

Dimensions at widest points approximately 90 mm x 70 mm x 8 mm thick

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

Dimensions  30 cm x 24 cm x 2

Polished Tiger Iron slab TI388 Citron chrysoprase DO170 Dendritic Opal rough rockTI388 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.