Industry Insight
The 417 hallmark for 10kt yellow gold is the per-mille expression of 41.7 percent gold content, a notation system used in British and European hallmarking that expresses precious metal content as parts per thousand rather than as a fraction of 24. The three permissible stamps for 10kt gold in the U.S. market reflect both the domestic karat convention and the international per-mille system, and the FTC accepts all three as compliant representations of the material's gold content.