Why is it that Gold Jewelry Turns White Sometimes?

Sometimes customers arrived at me and request why their gold jewelry suddenly changes color or has white spots, worrying about they can have purchased an unauthorized.
The truth is, all of these worries are unnecessary. Under normal circumstances, so long as it is purchased from a daily gold shop, the overall quality of the gold jewelry has been proven. After a little jewelry cleaning with some staff within a gold shop, the white spots on the gold will disappear, and the jewelry will be re-lit as new.
Why must this happen? Exactly why the gold jewelry turns white? Gold is amongst the nature’s most stable metals, and does not react with any oxide gas upward at room temperature, nor 3 major acid (sulfuric acid, nitric acid, hydrochloric acid) or weak acid. Only aqua regia (a mixture of hydrochloric and nitric acid) can corrode it. But mercury can be considered an exception, it is very easy to react with gold and make a white compound called amalgam. Therefore, after the gold jewelry is exposed to mercury, it will turn white immediately. Due to the fact that mercury is volatile, it could cause discoloration of gold even at a distance.
This may possibly occur in home, because mercury or mercury-type substances exist in many detergents, cosmetics and skin care products. If gold receives these mechandise, it is likely so as to modify its color, turning white, gray, or dark. Many women possess a habit of using product before touching their jewelry, which makes the chemicals contact the gold directly and will lead to discoloration of a given jewelry. In addition, perfume, hair spray, plain water, swimming pool water, and dirt because of long-term wearing, can also be prone to make gold jewelry change its color or fade. This process nothing to do having the purity of the gold, and it’ll mean the jewellery is typically a fake.
Gold jewelry should be kept from direct experience with the components referred, and is cleaned regularly. And also if it of gold jewelry has changed color, never use hard drive data object or tool to remove the changed part. The correct approach is by using alcohol lamp or welding torch which is used in jewelry processing to heat the white portion of gold, so that mercury can sublimate out of amalgam and separate from gold. In the event the jewelry gets cool, brush it lightly utilizing a toothbrush, and then wipe it and press it hard for a few times by using a soft cloth, after which the gold will recover its color. But prevent to accomplish this with a lighter, due to the reason that the jewelry will turn black easily for incomplete combustion of this very gas. K gold and inlaid jewelry never suit doing this, they must be appied to the gold shop to possess other proper treatment. However, if consumers will have questions about the quality of their jewelry, they must be to the professional department and have the treasure labeled as quickly as you can.

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