A copper-zinc alloy with a yellow color. The primary base metal for medieval Islamic inlaid metalwork.

A copper-tin alloy, typically harder and more resonant than brass. Common for cast objects.

Fastening one metal into another by cutting channels and inserting wire, strip, or sheet. Silver inlay on brass is characteristic of medieval Islamic metalwork.

Inlaying or overlaying gold or silver onto iron or steel. Not to be confused with Damascus steel.

Surface coloration from age, use, corrosion, or intentional treatment. May be original, accidental, or later applied.