Geological specimen - Cinnibar

Historical information

Cinnabar is naturally red, but can undergo photo-oxidation to form colloidal metallic mercury at the crystal surface. This mercury may produce a silver colouration

Significance

A 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.

Physical description

Red and brownish red stone with some whitish silver material at the surface

Inscriptions & markings

CINNIBAR / (Mercury sulphide) / Locality: Spain.

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