Pinchbeck and Red brass

Pinchbeck noun - An alloy of copper and zinc that is used in cheap jewelry to imitate gold.

Red brass and pinchbeck are semantically related. In some cases you can use "Red brass" instead a noun "Pinchbeck".

Red brass noun - Brass with enough copper to give it a reddish tint; used for plumbing pipe and other brass hardware and in cheap jewelry.

Pinchbeck and red brass are semantically related. You can use "Pinchbeck" instead a noun phrase "Red brass".