What does 427 mean on gold?

The number "427" on gold typically refers to its purity, indicating that the metal contains 427 parts per thousand of gold content, which translates to approximately 42.7% gold purity. This is not a standard marking for gold, as most gold jewelry is often marked with karat values (e.g., 14K, 18K), which represent the gold content in a different way. Therefore, "427" could also be a manufacturer's code or a reference number, rather than a common purity gauge. Always verify with a professional for accurate assessment of gold purity.