Currently, gold is the rarest and most precious metal, which has a high storage value. It is a common special reserve currency in the world. In ancient times gold has established its precious high symbolic status, while the high ductility of gold makes it able to be made of a variety of jewelry, crafts with bright color and shape, which welcomed by the people. In accordance with national standards, the purity of gold is represented by K, the content of per K gold was 4.166%. The gold circulating in current market is mainly divided into solid gold and K gold, pure gold means that the gold content is more than 99%. As the statement we have often heard about 24K gold, in theory, the gold content should be 100 percent, but in fact the 24K gold sold on the market, general content is about 99.99%.

Tungsten gold-plated means the surface of tungsten product will have a gold-plated treatment, in order to obtain a bright color just like gold in general, so as to achieve a higher ornamentation. Gold-plated is a very rigorous process, that using electrolysis or other chemical processes to make the gold attached to other objects surface so as to form a thin gold layer. Generally the gold-plated surface thickness of good gold-plated products is about 10 ~ 25μm, if the thickness is 2 ~ 3μm, then this gold-plated product is more ordinary. For the cheap products, its thickness is 0.18μm or less, and therefore it can not be called as gold-plated, but called gold-painted. With the extensive application of tungsten products, its excellent properties of non-toxic, environmental protection, good ductility and high specific gravity make it to be applied more widely. Tungsten has not only limited to be used as the materials of some equipment and the counterweights. Tungsten gold-plated can be made of many ornamental, practical and cost-effective collecting products, such as tungsten gold-plated rings, tungsten gold plated commemorative coins, tungsten gold-plated earrings, tungsten gold plated bracelet and so on.