Classification of gold jewelry

1. "Pure gold" jewelry
 "Pure gold" is usually divided into gold, thousands of gold. Color red yellow, soft, shiny eye-catching. But the absolute purity of gold does not exist, as the saying goes, "gold without red." To the level of modern science and technology can be extracted to purity of 99.9999% dedicated to the standard reagent reagent gold. As the reagent gold production costs are high, only from the use of jewelry value, the use of reagent gold jewelry is of little significance. "39 gold", fineness is 99.9%, commonly known as thousands of gold; "twenty-nine gold", fineness of 99%, "Golden", the color is 99.99%; Commonly known as gold.
2. K gold jewelry
K gold is pure gold in adding some other metals to increase the hardness, change color and reduce the melting point and made of alloy. As the proportion of other metals added, K gold of fineness, color, hardness, ductility and melting point and other properties are not the same. K gold jewelry is characterized by a small amount of gold, low cost, but also can be prepared into a variety of colors, and not easy to deformation and wear, especially after the gem inlaid beautiful appearance, but also show the precious gem bright. So in many cities in China is widely popular. K gold jewelry is rich in color, the current success of the red K gold, orange K gold, yellow K gold, green K gold, blue K gold, blue K gold, purple K gold, gray K gold, black K gold, White K gold, white K gold because of its color and platinum similar gloss, and then re-plated with a layer of rhodium, it is elegant and generous, can be real ones, and the price is much lower than platinum, so it is favored by many people. There are three main series of white K gold, namely gold and palladium, gold and nickel, gold and silver, or a combination of these alloys can form white gold.
 (B) Simulation of gold jewelry
1. Gold-plated jewelery
Gold-plated jewelry and more to silver or copper, the surface coating of gold, gold luster to replace the original color of the original material, thereby enhancing the ornamental value of jewelry. Gold-plated gold content of not less than 14K, the thickness of not less than 0.5 microns. Gilded jewelry is generally lighter, bending hard, while the thin layer of jewelry in the sandpaper on a rub, you can expose the base color, after the fire, the color white is silver, black is copper.
2. Gilt jewelry
Gilt is an ancient method of jewelry production, it is the gold dissolved in mercury, and then evenly applied to the jewelry surface, dry with charcoal baking, so that the mercury evaporated, and then agate calendering the surface, that is, Become gilt products.
3. Gold jewelry
Gold jewelry to silver, copper, lead, zinc and other alloys made of billet, and then by mechanical or other methods will be firmly wrapped in gold foil on the surface of the metal substrate to get the gold coating, called gold. Gold content of gold shall not be less than 14K, the thickness of not less than 0.5 microns.