How does niello decoration differ from enamelwork?

Niello and enamelwork are distinct decorative techniques that differ primarily in their materials and the resulting visual effects.

• Materials: Enamelwork uses powdered glass colored with metal oxides, which is fused to a metal surface through heat to create a glossy, vitreous glaze. In contrast, niello is a black metallic alloy composed of silver, copper, lead, and sulfur.123
• Application and Appearance: Enamelwork is prized for its brilliant, permanent, and often multicolored finish, which can be opaque or translucent. Niello is used specifically to fill engraved designs on metal, creating a stark, high-contrast black-and-white effect against the bright surface of the underlying metal, typically silver.123
• Purpose: While both techniques embellish metal objects, enamelwork is often used to add vibrant color and can even mimic the complexity of oil painting. Niello is traditionally used to emphasize incised lines and patterns, resulting in a more monochromatic, graphic decorative style.231