The problem that often occurs in gold jewelry is as follows:
Quickly become dull or black. Caused by a less than perfect blend of time making jewelry which is usually done the hand or 'hand made' difficult to treat because it will definitely fast black again.
Dull and black can also be due to storage in a bag or something made of leather. Genuine leather job using materials usually associated with sulfur or amoniac. Or maybe you use a necklace of silver skin. Not all of the skin causes the skin black when the job is done right. So the skin should be suspected as the cause of black gold items.
Dull or black when not in use. Usually stored in a long time in wood cabinets. Varnishes and wood finishing less than perfect can make quick and black dull is because silver oxidation by wood finishing materials.
Dull also be caused by exposed to sea water, water containing salt or sulfur. Gold often with salt and sulfur oxidation.
Gold changed color to red too. This is because copper compounds that have emerged out of the surface. This law of nature that the light is always on top. The reason is because the mixture of levels could be incorrect. But if from the beginning had this redness is a color called rose gold.
Red appears uneven. This problem is called a cloud or fire skill. This is because when there is a process of soldering in a red area that appears. This mix is one of them is soldered copper surface.
