Cinnabar is naturally red, but can undergo photo-oxidation to form colloidal metallic mercury at the crystal surface. This mercury may produce a silver colourationA common red ore that is often found in locations where there has been volcanic activity and has been historically used as a red pigment as a cosmetic or for colouring stone. It is commonly used today as a method of creating mercury.Red and brownish red stone with some whitish silver material at the surface CINNIBAR / (Mercury sulphide) / Locality: Spain.burke museum, beechworth, minerology, geology, geological specimin, spain, cinnabar

A fossilised wooden material where the original organic material has been replaced by silica.A decorative type of fossil wood where the original organic material has been replacedRed and brown marbled appearance. Strongly resembles regular wood material in both colouration and texture.TIBOOBURRA / burke museum, beechworth, fossils, fossilised wood, silica, tibboburra, geological specimin, geology