Archaeological discoveries

What is a 1776-1976 Gold Coin made into necklace worth?

A "1776-1976" gold coin made into a necklace is not a known numismatic item. There were commemorative gold coins minted in the United States in 1776 and 1976, but these are separate coins and are not combined. If you have a coin like this, it is likely a replica or a piece of jewelry that uses a reproduction or imitation of a coin. The value of such an item would depend on the materials used, craftsmanship, and any additional factors such as historical significance or rarity. It's best to get an appraisal from a reputable jeweler or numismatic expert for an accurate valuation.