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TGM Fossilised wood is a stunning form of stone that brings a unique sense of age and atmosphere to an aquarium. It is sometimes called petrified wood, which comes from the Greek ‘petri’ meaning stone or rock and therefore literally means ‘stone turned into rock’. Fossilised wood is literally wood, or plant materials, from thousands of years ago that has been preserved by the process of permineralisation: the fossilising process in which all the organic…