verdigris

Definition

A blue-green or greenish patina that forms on copper or brass when exposed to air and moisture over time. The chemical layer consists primarily of copper carbonate and copper sulfate, and is valued in metalwork and sculpture for its aesthetic properties.

Example Usage

The statue had developed a beautiful layer of verdigris after decades in the garden.

Origin

From Old French 'vert-de-gris' meaning 'green of Greece,' referring to the greenish pigment produced from copper.

Fun Fact

Verdigris was historically ground into a pigment and used in paintings, though it could be toxic to artists who worked with it.

Source: Definition backfill (hailey)

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