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wholesale jewelry shows 2014 Gold is soft.
although gold is a very soft metal, it is not as good as lead and tin metal. Use nails on pure gold to draw traces. This softness makes gold very easy to process. However, this point is not ideal to the maker of the decorations, because it is easy to make the decorations hurt and lose it to lose it. Glossing and even affecting beauty. Therefore, when making jewelry with gold, copper and silver are generally added to improve their hardness.
The international gold is generally based on ounces. In ancient China, "two" was used as a gold unit, and it was a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments.
The category of gold
1, cooked gold: It is the gold that has been smelted and purified by the gold. Generally, the purity is higher and the density is fine. Based on the height of the color, the cooked gold is divided into three types of gold, red gold, and color gold.
2, pure gold: 99.6%or more of the color
3, the gold-containing content is not less than 990 ‰
4, the foot is foot The gold content is greater than 999 ‰.
5, Chijin: It is close to the meaning of pure gold, and the standards of different locations are different. The gold sold in the international market is 99.6%of
6, which is Chi Jin. The red gold in the territory is generally between 99.2%-99.6%and generally above 99%.
7, color gold refers to gold containing other metal impurities such as silver and steel. Because it is very complicated, according to the impurities it contains, it can be divided into two types: color gold and mixed gold.
The above reference: Baidu Encyclopedia-Gold
wholesale jewelry gold filled Gold soft. Gold's softness is good, easy to forge and extension. The hardness of gold is low. Gold is an precious metal, gold is valuable, and the value content is relatively high in gold, also known as gold, chemical symbol AU, atomic order 79, atomic volume 197, 22 in the same place, and mass number 183-204. The melting point of gold is 1063 ° C, and the boiling point is 2808 ° C. The density of gold is large, 19.32 grams/cm at 20 ° C.
The softness of gold is good, easy to forge and extension. The current technology can crush the gold into a 0.00001 mm thick film; pull the gold into a filament, one gram of gold can be pulled into 3.5 kilometers long, with a diameter of 0.0043 mm. The hardness of gold is low, and the hardness of minerals is 3.7, and the hardness of 24K gold jewelry is only 2.5.
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The average content of gold in the crust is about 1.1 million) (0.0011ppm), and the content in the seawater is about 100 billion % (0.00001ppm). Due to hundreds of millions of years to billions of years of crustal movement and geological changes, the gold elements are rich into gold mines. The gold ore with general industrial value is 2-3 grams/ton, and the rich ore has 5-50 grams/ton. Fugu Mine 50-500 grams/ton.
has a gold, the smallest single, the largest dozens of kilograms, and the rare large pieces of gold hundreds of kilograms. Because of some dog heads, commonly known as dog head gold, Indian scientists have found two nearby pieces nearby nearby. 2.5 tons of dog head gold; poor ore at 0.1-1 grams/ton, and the level of metallurgical technology has industrial mining value.
The pure gold in nature is very small, often including silver, copper, iron, 钯, 铋, platinum, nickel, 碲, selenium, 锇 and other accompanimental elements. Natural gold contains 15%of silver in silver More than 20%of copper are called copper gold ore, 5%-11%of 钯 钯 钯 钯 钯 矿 矿 钯 铋 铋 铋 矿 矿 矿 矿.
This has a parental sulfur, and is often close to sulfur such as pyroneite, poison sand, square lead ore, and 锑 ore.
wholesale reggae jewelry Gold is soft.
The gold is a very soft metal, but it is not as good as lead and tin metal. Use nails on pure gold to draw traces. This softness makes gold very easy to process. However, this point is not ideal to the maker of the decorations, because it is easy to make the decorations hurt and lose it to lose it. Glossing and even affecting beauty. Therefore, when making jewelry with gold, copper and silver are generally added to improve their hardness.
The international gold in international gold is based on ounces. In ancient China, "two" was used as a gold unit, and it was a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments.
The category of gold
1, cooked gold: It is the gold that has been smelted and purified by the gold. Generally, the purity is higher and the density is fine. Based on the height of the color, the cooked gold is divided into three types of pure gold, red gold, and color gold. 990 ‰
4, foot gold -gold content is greater than 999 ‰.
5, Chicin: It is close to the meaning of pure gold, and different locations have different standards. The gold sold in the international market is 99.6%of
6. The red gold in the territory is generally between 99.2%-99.6%and generally above 99%.
7, color gold refers to gold containing other metal impurities such as silver and steel. Because it is very complicated, according to the impurities it contains, it can be divided into two types: color gold and mixed gold.
wholesale jewelry dallas market Gold is soft.
Henth gold is a very soft metal, but it is not as good as lead and tin metal. It can be traces with nails on pure gold. This softness makes gold very easy to process. However, this point is for decorations. The manufacturer said that it is not ideal;
Because this is easy to hurt the decoration, it makes it lose its gloss and affects the beauty. Therefore, when making jewelry with gold, copper and silver are generally added to improve their hardness.
The cleaning method 1. Protect the gloss of the gold jewelry, you can apply a layer of nail polish thinly on it.
2. If there are black silver films on the surface, 2 grams of salt, 7 grams of soda, 8 grams of bleaching powder, 60 ml of clear water, are made into a "golden device cleaning agent", put the gold jewelry in a bowl, and the golden jewelry is in a bowl. Pour in the cleaning agent. After 2 hours, remove the golden jewelry, rinse with water (preferably not hard water), buried in the wood chips to dry, and then wipe it with a soft cloth.
3, the ring inlaid with a cotton roll with a popsicle or match stick, wet the gemstone and its frame in the mixed fluid of the dew and glycerin, and then use the velvet cloth to brighten the ring. Do not scrape it with a kind of sharp objects.
4, salt and vinegar mixed synthetic cleaning agent, and use it to wipe the pure gold jewelry, which can make a long time.