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Inlaid diamond ring, platinum and 18K gold are the two most commonly used materials. Many consumers think that 18K gold will change color and they are not willing to choose 18K gold diamond ring. Is this because of the quality problem of 18K gold? Is it better to choose 18K gold or platinum for the diamond ring?
The answer is: 18K gold itself will not change color, there is a layer of coating on the outside of the jewelry, because some behaviors in life may cause the coating to fall off and show the original color of 18K gold.
18K gold refers to a gold alloy with a purity of not less than 750 ,, and its color is yellow. Of course, some 18K gold products can be made into rose gold (that is, yellow is slightly red) by changing the formula of another 25% alloy (such as adding a high proportion of copper). The 18K white that is seen on the market is white on the 18K gold surface, and the plating material is mostly enamel.
Niobium itself is also a rare metal that belongs to the platinum group in the periodic table of the elements, that is, the same group of elements as our common platinum metal. It is chemically stable and has excellent corrosion resistance and is a good coating material. The price is even higher than platinum (the international precious metal price, which is almost twice as high as platinum).
Although the nature of the enamel itself is very stable, as a coating of 18K gold jewelry, the thickness is relatively thin, it will still be worn away, and then it will slowly reveal the original yellow of 18K gold. As a daily worn jewellery, the part inside the palm of the ring will obviously change color in about 2 years.
After the discoloration of the 18K gold jewelry, only the surface plating part is polished and polished, and then re-plated, as soon as possible, almost no gold loss. The cost of gold plating is very low. Although the crucible itself is very expensive, the coating only needs a small amount of crucible. Usually, the cost of plating in processing is only tens of dollars.
Taken together, the 18K gold plating discoloration can be solved at a small cost. If it is compared with platinum due to its soft texture: it is easy to deform, easy to grind and the loss caused by re-polishing after grinding, the maintenance cost of 18K gold is relatively low. In addition, 18K gold itself has a high hardness and is not easily deformed, resulting in the shedding of the diamond, which can improve the safety.
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