市场上的黄金制品成色标识有两种：一种是直接用含量百分比表示，通常是将黄金重量分成 1000份的表示法，如金件上标注 9999 的为99.99%，而标注为586 的为58.6%；另一种是K金，如G18K和 G14K等，IK 表示黄金的含量为4.1666%。
There are two kinds of labels for gold products on the market: one is directly expressed by content percentage, which is usually a way to divide the weight of gold into 1000 parts. The other is K gold, such as G18K and G14K, etc. IK means the content of gold is 4.1666%.
我国对黄金制品印记和标识牌有规定，一般要求有生产企业代号、材料名称、含量印记等，无印记为不合格产品。国际上也是如此。但对于—些特别细小的制品也允许不打标记。
China has regulations on the imprinting and marking of gold products, and generally requires the production enterprise code, material name, content imprinting, etc., while non-imprinting is unqualified product. The same is true internationally. But some very small products are also allowed to be unmarked.