Is 10k GM real gold?

Whether 10k GM is real gold depends on what you mean by real. A piece that bears the marking 10k GM usually contains some gold, but it is not solid gold. On jewelry, GM typically indicates that a piece is gold-plated, meaning that the maker produced it out of base metal and then added a thin layer of gold. In the case of a 10k GM piece, the gold is 41.7% gold and 58.3% alloy. In other words, a piece displaying this hallmark features a small amount of genuine gold. On 1stDibs, find a large collection of gold jewelry.