Hard gold corresponds to the original pure gold (gold content exceeds 99.5%). Because pure gold is soft, when making rings, bracelets and other jewelry, it is basically solid and thick gold, which also causes gold to be heavier and more expensive.
Hard gold is a new technology of pure gold, which improves the hardness, so we can be your light ring!
In addition, brand stores are clearly marked, not to mention being cheated! Unless it is selling fakes or involving false propaganda!