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Dimensions at widest points approximately 135 mm x 50 mm x 50 mm thick
grinding or polishing as the matrix holding the pisolites (small round pebbles) is in many cases quite soft
Tumble polished Lime Magnesite (Lemon Chrysoprase)
BA114 Polished Brazilian Agate slab
Polished Tiger Iron slab TI277 Green Opal Dimensions at widest points approximatelyTI277 Tiger Iron slab, polished on one side . Dimensions at widest points approximately 155 mm x 80 mm wide x 8 mm thick. Weighs: 299 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.