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Mineral colour

Red minerals
Rubies are probably the best known red minerals. Ruby is the precious red form of the mineral corundum - second only to diamond in hardness. Ruby is coloured red because it contains a tiny amount of the metal chromium - the same metal that makes emerald green!

Hematite is a reddish-brown ore mineral of iron, and its name comes from the Greek word meaning 'blood'. Fire opals are orangy-red, and realgar and cinnabar are also red minerals. Beryl can also come in shades of red and pink.

Realgar Fire opal Red/pink beryl
Realgar, fire opal and red beryl are all examples of red minerals.

Return to the Colour wheel to learn more about mineral colour.