Chromium(III) oxide
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Chromium oxide is an inorganic compound with the formula Cr2O3. It is one of the principal oxides of chromium and is used as a pigment. In nature, it occurs as a rare mineral called eskolaite.
Chromium oxide cropped
Eskolaite mineral
Viridian
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Viridian is a blue-green pigment, a hydrated chromium oxide, of medium saturation and relatively dark in value. It is composed of a majority of green, followed by blue. The first recorded use of virid
Chromium(III) oxide
…exothermic decomposition of ammonium dichromate: Because of its considerable stability, chromia is a commonly used pigment. It was originally called viridian. It is used in paints, inks, and glasses. It is the colorant in "chrome green" and "institutional green". Chromium(III) oxide is a precursor to the…
Chromium(III) oxide sample
Viridian (Pigment Green 18), left 3 smears; and Phthalocyanine Green (Pigment Green 7), right 3 smears
Fritz Bamberger - Ansicht der Sierra Nevada, 1863. Bavarian State Painting Collections
Claude Monet - Arrival of the Normandy Train, Gare Saint-Lazare, 1877, oil on canvas. Art Institute of Chicago