nielloing

noun
  1. the process or art of decorating metal (especially steel or silver) with a black metallic alloy (niello) by inlaying or engraving
  2. Usage: specialized metalworking term; often used in jewelry and decorative arts
verb
  1. to decorate (metal) with niello; to apply niello inlay to a metal surface
  2. Usage: present participle of niello; specialized metalworking term

Examples