With the opening up of the gold market, gold as a hedge, one of the important metals, a growing concern by consumers, then, for gold jewelry, how to distinguish the authenticity of this?
Gold jewelry refers to the gold as the main raw material for the production of jewelry, from gold on K can be divided into pure gold and gold two categories: pure gold jewelry of gold in more than 99% up to 99.99%; K gold jewelry are In its gold material is added to other metals, such as silver, copper metal from the jewelry, according to gold content is divided into a number of different K, such as 24K (more than 99% gold), 18K (gold content 75%) and so on.
24K gold is pure gold, which is generally not practical for wearing, as it is too soft; 18K gold is 75 percent gold; 12K gold is 50 percent gold; 10K gold is 41.7 percent gold. Most gold items are marked with a karat mark, even though it is not required by law.
Gold jewelry, many of the identification methods, several methods have simple: look one color, according to the different gold luster and color can generally distinguish between pure gold, K gold, real gold, fake gold, or gold to red than yellow, fineness in more than 95%; Second look density formula can be used: a certain quality of gold jewelry (grams) of gold jewelry than a certain size (cubic centimeters) to calculate the mean density, calculated by measuring the density of gold jewelry, a density of 19.32 grams / cubic centimeters, compared with about or less pure gold pure gold, or else is non-pure gold or gold into a color (this method of jewelry without any destructive); fineness high carved it with a nail left traces of more than 97% of the fineness gold jewelry, two or three times after bending, bending appeared wrinkles, 95% of fineness of gold jewelry, bending feel hard, about 90% of fineness of gold jewelry, bending when the hard, containing more impurities in gold jewelry , bending or breaking two or three times; 4 Phonology, watch flexibility; five identified by the touchstone of fineness, that is, on the licensing and use of gold ornaments were tested on the touchstone of grinding Road, by comparing the color to determine the fineness of gold jewelry.
