Karat (K) represents the purity of gold, it has a similar pronunciation to the diamond weight unit carat (ct), but their representative meaning is completely different, one represents the  purity, the other expressed the weight. No matter it’s K gold or K gold-plated, its meaning of existence is just to increase the aesthetics of the products.

 

In the purity of gold, 1K stands 4.166% of the gold content, 18K gold, also named AU750, its gold content is 75% . For 18K gold products, sometimes its value even is higher than the gold products, which content is more higher than it. We all know that gold has low hardness, although it has good plasticity and ductility but it also means that would be susceptible to wear. It makes the people who are more willing to buy the gold jewelry that will be more difficult to accept. 18K gold products usually add some silver, platinum, nickel and other metal materials to improve the overall performance of the finished products, such as the ornamental, wear resistance and corrosion resistance etc. Thus, 18K gold products also are more welcomed by the people, but it also means there will be some additional production process, thereby increasing the costs of production, which is depending on the difficulty of the production process. The 18K tungsten gold-plated refers to plating an gold layer which content is 75% in the surface of the tungsten products, it has the tantamount beautiful appearance with the 18K gold products.

 

Undoubtedly, the biggest difference between 18K tungsten gold-plated and 18K gold lies in the different preserve and increase value, the preserve and increase value of 18K gold is far greater than 18K tungsten gold-plated. However, there is no difference between their appreciation value, they all have the more stylish and beautiful appearance, which owns more favor by collectors.