Answer:

niello

Answer	Crossword Clue
NIELLO	Decorative metalwork
NIELLO	Decorative alloy
NIELLO	Enamel-like alloy

NIELLO	Ornamental metalwork
NIELLO	Inlay material
NIELLO	Metal design using a black alloy.
NIELLO	Alloy used as an inlay.
NIELLO	Decorated metal work.
NIELLO	Deep black alloy.
NIELLO	Black alloy.
NIELLO	Decoration on metal

NIELLO	Decorated metal
NIELLO	Ornamental alloy
NIELLO	Metallic alloy
NIELLO	Black ornamental work
NIELLO	Metal inlay