Question

the silver or copper coated with gold is

Answer 1

Hey mate here is your answer》》

A barrier metal layer is used to counter this effect. Copper, which also migrates into gold, does so more slowly than silver. The copper is usually further plated with nickel. A gold-plated silver article is usually a silver substrate with layers of copper, nickel, and gold deposited on top of it.

Hope this answer will help you..《《

Answer 2

Silver-gilt is the write answer