Patina

A patina is a surface appearance of something grown beautiful, especially with age or use, often seen on metals.

Part of speech: noun
Definition: In jewelry and metalworking, patina refers to a layer that forms on the surface of copper, bronze, and similar metals (or stone and wood) through oxidation over a long period. This natural process results in a range of green or brown films on the surface that is often highly sought after for its aesthetic qualities. In addition to natural patination, artificial techniques can be used to induce or accelerate this effect, producing an aged or antique appearance that adds character and depth to the piece. The presence of a patina is commonly seen as an enhancement, adding to the value and beauty of jewelry or other crafted items by showcasing their history and durability.