Gold vermeil (pronounced vermay) is sterling silver that has been gold plated, Vermeil must use at least 10 carat gold and Vermeil uses the same process as gold filled metals, the minimum that we use is 18ct.
The difference between vermeil, and gold-filled is that the base metal is of higher quality as it is always sterling silver. This is better for people who get allergies to the base metals of plated items such a copper and brass.
Vermeil pieces also have a thicker coating of gold than plated items do - often up to 50% thicker.
Due to the use of both sterling silver and gold, vermeil is more expensive than both plated and filled metals.