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510012176

Copper Minerals - Azurite, malachite and chalcotrichite are all minerals of copper and sources of commercial ore. Ground malachite and azurite have been used since ancient times as pigments to colour paint.

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Irish Photo Archive
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Copper Minerals - Azurite, malachite and chalcotrichite are all minerals of copper and sources of commercial ore.  Ground malachite and azurite have been used since ancient times as pigments to colour paint.