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Welcome to our extensive antique jewelry glossary with around 1,500 jewelry related entries.If you feel you are missing an explanation, feel free to let us know and we will add it.
A thin, greenish film or discoloration that forms, after long exposure to the atmosphere, on bronze and copper, sometimes on jewelry of such metals, adding a prized artistic effect. The natural patina is a carbonate of copper that forms to protect the metal from further oxidation. By extension of the term, it has been applied to a reddish patina-effect on ancient gold jewelry and to the so-called patina on silver that is a surface blur resulting from numerous shallow scratches. An artificial patina can be produced with acids.
From: An Illustrated Dictionary of Jewelry, autor: Harold Newman, publishers: Thames and Hudson