wholesale jewelry buying What is the difference between industrial gold and jewelry gold sold in the store?

wholesale sterling gemstone jewelry The main needs of gold in industrial aspects are the following aspects:
. The main needs of the electronics industry and dentist, accounting for about 10%of the total demand for gold.

. Due to the restrictions on the industrial industry, the change is stable and the impact on the price of gold is small.

. The year -on -year increased by 2%year -on -year was 419 tons.

The impact on price: related to the economic boom, restricted by the industry itself.

If: 2001-2006, the world economy has grown rapidly, high -end electronics industry, and aerospace have also developed rapidly, and industry demand for gold has also maintained stable growth.

Sweetal gold: Gold (GOLD) is a single -quality form of chemical element gold (chemical element symbol AU). It is a soft, golden, corrosive precious metal. Gold is one of the rare, precious and most valued metals. Internationally, gold is generally based on ounces, and ancient China was used as a gold unit. 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.

four types of texture
This full gold
Mu met gold is gold that has been smelted and purified. Generally, the purity is high and the density is thin. Some can be directly used in industry. Production.
M common gold bars, gold blocks, gold ingots, and various jewelry, utensils, gold coins, and industrial gold, gold, gold boards, etc.
Due to the different uses, the required color is different, or because the device is not purified, only the melting is not pure or the purity of the mention is not enough, forming a gold that is different. People are accustomed to dividing the cooked gold into three types: pure gold, red gold, and color gold according to the high and low.
The gold that reached a fairly high purity after purification is called pure gold. Gold generally refers to pure gold with more than 99.6%.
. The meaning of Chicin and pure gold is close, but due to the different time and local standards, the standards of Chijin are different. The gold sold in the international market is 99.6%of Chi Jin. The red gold in the territory is generally between 99.2%-99.6%.
. The color gold, also known as "secondary gold" and "tide gold", refers to the low color. Due to the different metal content of these gold, the high color is 99%high, and only 30%of the low.
The is divided by different metals, cooked gold can be divided into color gold, mixed gold, K gold, etc. The color gold refers to gold only mixed with silver components, regardless of whether it is high or low. There are more color gold, commonly in gold bars, gold ingots, gold blocks and various utensils and gold jewelry.
three, mixed gold refers to the gold inside the gold, in addition to the silver, but also contains other metals such as copper, zinc, lead, and iron. Depending on the type and quantity of the metal contained in, it can be divided into small mixed gold, large mixed gold, bronze mixed gold, and lead -containing large mixed gold.
four, K gold refers to gold and copper according to a certain proportion of gold, according to the formula of 24K formula. Generally speaking, the more the proportion of k gold is silver, the more colorful the color; the large copper ratio is purple.
k value expressed in the value is just a rough number, and it is not very accurate. Most of them are used to use even K value, such as 24K, 22K, 20K, 18K, etc. The meaning of 18K means that the 24 copies contain 18 copies of gold, which is equivalent to about 75%. K gold calculation method: The calculation formula of K gold is equivalent to the gold content is: K value ÷ 24 × 100%(ie K value × 4.1667%)

"Success" or "color".
. In more than 200 BC, Greek mathematician Archimdes was worried about whether a crown was made of pure gold. When he took a bath in the bathtub, he found the law of being called "Akimid's proportion": an object immersed in the liquid was affected by the upward buoyancy; the size of the buoyancy was equal to the weight of its discharge liquid. As a result, the king's customized crown was made in pure gold. So, how is the purity of gold expressed?
1 1. Use "K gold" to represent the purity of gold
The national standard GB11887-89 regulations, each opening (English Carat and German karat, often write "K") gold content is 4.166%, so , The amount of gold content of each opening is (in the brackets are national standards):
8K = 8*4.166%= 33.328%(333 ‰)
9K = 9*4.166%= 37.494%(375 ‰) ‰) ) R n 10K = 10*4.166%= 41.660%(417 ‰)
12K = 12*4.166%= 49.992%(500 ‰)
14k = 14*4.166%= 58.324%(583 ‰)
18K = 18*4.166%= 74.998%(750 ‰)
20K = 20*4.166%= 83.320%(833 ‰)
21k = 21*4.166%= 875 ‰ (875 ‰ ‰ ）rn　　22k=22*4.166%=91.652%（916‰）rn　　24k=24*4.166%=99.984%（999‰）rn　　24k金常被认为是纯金，成为" "1000 ‰", but the actual gold content was 99.99%, and it was 23.988k.
2. Use text to express the purity of gold
The text marks on some gold jewelry, the regulations are:
enough gold-gold content is not less than 990 ‰
thousands of gold- -The gold content is not less than 999 ‰
It, some are directly attached to the actual gold content.
3. Use scores to represent the purity of gold
. If it is marked into 18/24, the color is 18K (750 ‰)
If the marked to 22/24, the color is 22K (916 ‰)
. Use Arabic numerals to represent the purity of gold
for example 99-"Foot gold"
, such as 999-- indicating "Thousands of Gold"
There are regulations that the cards are generally required to have production enterprise codes, materials names, content marks, etc., and unspeakable products are unqualified products. The same is true internationally. But for some particularly small products, they are also allowed not to mark.

The cleaning method
1. The gloss of the gold jewelry can be applied to 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, using it to wipe the pure gold jewelry, which can make a long time.
5, wipe or scrub with hot rice soup with hot rice, can also restore gloss.
6, scrubbing with ammonia water

If discrimination
1, whether gold has a white highlight
Seeing white highlights, because gold and 铱 cannot be fused together, it means that the gold is mixed with 铱.
2, measured the proportion.
In the weight of a pure gold bars with an balance, and then put the gold bars into a measuring cup and flood the gold bar. Then put the detected gold bars in a measuring cup, whether the scale of the water rises or decreases. As long as it changes, it means that the gold bar is not pure gold. But if it is gold jewelry, this method is not applicable because there is air in gold jewelry.
3, real gold is not afraid of fire.
This gold bars or gold jewelry burned for a while to observe its changes. Because the oxidation reaction occurs with oxygen in the air, the gold bars with insufficient purity will become gray; and the color of the pure gold will be red after the fire is baked. However, this method may be destroyed to jewelry.

wholesale jewelry in karachi It is better to buy gold bars, and the purity of industrial gold is not enough. It ’s not cost -effective to add the money from the buyer to the buyer's gold. The inconvenience of going to the real thing, and the storage safety issue! It is necessary to learn more about financial management in Shaanxi Fubao Xi'an, and to do gold and silver financial management. You can contact the following QQ!