bulk wholesale jewelry rings How to identify gold and silver thanks, the great god helped

fashion jewelry bangles wholesale The authenticity of the authenticity of the real and false gold jewelry identifies the authenticity of gold jewelry. In addition to using gold cards, testing gold stones, eating golden tigers and other tools and chemical methods, the following simple methods can be used It is easy to break easily, apply it with your hands, and you will have traces with harder things; fake gold, gold plating, gold, or doping into low color, the quality is hard when the hands are bent bend. Second, the real gold jewelry is thrown on the table, and the sound of "cricket"; the fake or low -colored throwing on the tablet is sharp, and it jumps higher than the real gold. Third, real gold jewelry is golden; excessive red ones are imitation gold, and light -colored are silver, aluminum and other mixtures. Fourth, real gold jewelry can not change color with fire; fake refractory resistance will become black -purple, and it looks unsightly. Methods should be comprehensively used to argue. Buying 18K gold jewelry is to beware of the current, 18K gold jewelry is low in price, many varieties, bright gloss, high hardness, and easy to set with gemstones. It is favored by consumers. However, the recent 18K gold jewelry marked with "JP" or "JF" has emerged in the market, but many consumers have shouted. It turned out that according to the relevant provisions of the national gold jewelry, "JP" indicated that it was gold -plated jewelry, and "JF" indicated that it was imitation gold jewelry. "18kjp" is 18K gold plating, and "18KJF" is 18K imitation gold. At present, some merchants who operate 18K gold jewelry are the weakness of the general public that they do not understand this common sense. The price of gold -plated or imitation gold jewelry is the same as the price of gold jewelry with 18K. When customers buy, they do not explain to the customer to make customers mistakenly think that the jewelry marked with "18KJP" or "18KJF" is 18K gold jewelry. Therefore, it is hoped that when buying such accessories, consumers should ask more, understand, observe more, and compare them, and beware of being deceived. Try to buy from the reputable Mingdian and large shops. Understand 4C to buy Diamond Diamond Confidence Carat, big diamonds, Gram -Guizhou Diamond Diamond Weight, Craph (also known as card) calculation. 1 carat = 200 mg = 0.2 grams. One carat is divided into one hundred copies, each called one point. 0.75 carats are also called 75 points, and 0.02 carats are 2 points. In the case of similar conditions, as the weight of the diamond increases, its value increases geometrically; diamonds with the same weight will be far from the difference in color, clarity, and cutting. In each different size and shape, you can find good quality diamonds. The most important thing is to find a diamond that is suitable and style to make you like. Clarity is crystal clear and pure and difficult to find diamond crystals in the mantle magma deep in the earth. The environment is complex, the composition is diverse, the temperature and pressure are extremely high, and after hundreds of millions of geological changes, it will inevitably contain various debris or existence flaw. The color, how much, size, and position distribution of these inside contains the effects of different degrees on diamond clarity. Usually, 10 times large mirror inside the diamond, surface defects and its degree of impact on gloriousness, and the clarity level of unsolved diamonds is subdivided into LC, VVS1, VVS2, VS1, VS2, SI1, SI2, P1, P2, P3, 10, 10 level. Diamonds have been divided into excellent, good, good, better, generally 5 levels. Colum -free, elegant and unique diamonds have a variety of natural colors, from precious colorless (white after cutting), rare dive blue, pink to common slightly yellow. The more transparent, the more white light can penetrate, and the more colorful after refraction and color. Diamond color grading is a classified environment in the professional laboratory. The technicians will be determined repeatedly with the standard color of the hierarchical diamond to the standard color. The whitening diamond is graded to D -Class (that is, start with Diamond's first letters). The color of diamonds is divided into 11 levels, in turn: D, E, F, G, H, I, J, K, L, M, N. The brilliant glory of the cutting light of the cut (CUT) is attributed to its unique high refractive index and high -color scattered performance. However, without cutting diamonds, the appearance is only flat. Only by accurate calculation, careful design and perfect cutting and grinding, the light is fully reflecting the top surface to make the beautiful diamond light. Diamonds are the hardest substances. They are not destructive, never worn, and they are glory and eternal. The method of judging the advantages and disadvantages of cutting work: pick up the diamonds, stare at the light of the top surface, the exquisite diamonds of the car worker are brilliant and dazzling, and it will not be as simple as inlaid or different styles. Is it simple? Is it? You can do it. The level of the car is divided into: good, good, general. How to buy true jadeite first, first learn the basic knowledge of jadeite; second, choose the old -fashioned reputation shop to buy emerald; third, the goods are three; fourth, ask whether it is A or B goods; Fifth, ask the store to obtain an appraisal certificate, especially the certificate issued by authoritative departments such as the Guangdong Provincial Technical Supervision Bureau. The above 5 points are done. You can buy positive goods even if you can't buy cheap goods to avoid economic and mental losses. "South Africa Diamond" is produced in South Africa? A total of 27 countries in the world have found diamond mines, most of which are located in South Africa, former Soviet Union, Australia and Canada. my country has also found a small amount of diamond mine in the area of ​​Wafangdian, Liaoning, Mengyang, Shandong, and Hunan. In Africa, Angola, Botswana, Zair, Tanzania, and Guinea are all important diamond -producing places. South Africa is the earliest country in the world to discover large -scale diamonds. Many famous large diamonds and high -quality diamonds are produced. Since this country, "South African Diamond" is very famous. Based on commercial factors, the recent diamond production of various countries has not been announced. The generally recognized five major diamond countries are Australia, South Africa, the original Soviet Union, Zair, Botswana, and the output ranking is: Australia, Botswana, and the original Soviet Union South Africa. The minimum cutting (processing) center is not the place where the diamond is produced. The main diamond cutting center of the world is Belgium, Israel's Antwerp, New York, and India. The cutting center is far from the mine. This is the case of diamond processing and sales. The British company DE Beers controls more than 80 % of the diamond ore in the world. Further sales, so the market supply and price of diamonds are monopolized, which has increased its prices every year. Diamonds in the same place have not changed their material chemistry. Each mining area has different diamonds with different quality. The graded evaluation of diamonds is performed according to the 4C standard. It is almost impossible for this aspect to be an appraisal agency. It is precisely that the normal identification certificate in the country does not indicate the place of origin. We often see that the country's most authoritative GIA appraisal certificate is not produced. It does not issue the name of the origin. It is based on the above factors. The national standards were implemented on May 1, 1997 that the national standards were clearly stipulated that "the place of origin is not involved in the name" and specifically pointed out that diamonds cannot be called "South African diamonds". Why do "South Africa diamonds" often appear? On the one hand, because of the earliest discovery of Diamonds in South Africa, many famous diamonds produced in South Africa. This is a traditional title. Secondly, in the 1970s, the Soviet Union produced commercial value diamond imitation products "synthetic cubic oxidation" (commonly known as "Soviet diamond", the appearance is close to the diamond), in order to distinguish it, people call natural diamonds as "South Africa diamonds". In addition, due to Hong Kong, the jewelry store in Hong Kong calls diamonds as "South African Diamonds". Act, it is not rigorous and irregular, and is not allowed in the Mainland. Guanyu Qiaoju is gentle and shiny, and is transparent and opaque. There are cotton wool or other impurities in the jade articles, which is normal. Fake jade wares have no aura, the color is dry, dark and rigid, and there are bubbles in some inside. The true jade was put in his hand, and his feel was heavy, and the fake was lighter. The true jade is harder, with a knife without traces, the fake is soft, and the knife cuts the traces. Hall the appraisal with a thread and tap gently. The fake and beautiful sound is emitted (this method is suitable for slightly thin jade pendants). The fracture of the real jade ware is uneven, and the material structure is dense. The fake fuse is neat and brighter, which is glass things; the material structure of the fracture is rough, and the waxless luster is a stone type. It is observed in detail with a magnifying glass of more than seven times to identify its edges, horns, holes, hollow, and carved lines. Local, the clues of fakes can be found in the subtle place. Gold (AU) gold is a noble metal. It has a softer texture and can be made into various shapes. Physical properties: Density: Appearance: Golden Point: Hardness: Dispensing: Extreme 19.3 grams per cubic cubic centimeter 1064 degrees Celsius. Film, so it is the first choice for jewelry) Chemical properties: not oxidized at room temperature, not melted in acid (dissolved in the king water) G999 or thousands of gold) gold content is not less than 999 ‰, fear of mercury Thousands of Gold (Seal: Football 18K Modern Modern Story generally uses Chinese platinum physical properties: density: hardness: Mo's chemical properties: stable nature, insoluble in any acid market in any acid market Karat White Gold, Chinese literal translation "White Gold" is made of gold as the main ingredient. In addition, it is made of silver, copper, and a small amount of nickel and zinc, which does not contain a little platinum. Literally believes that K platinum contains 75%of platinum. K 18K gold and 18K platinum: 75%gold, but because the other 25%of the metal component ratio is different, the appearance of the two is different. Gold's yellow k white gold is yellow in white. Both contain 18K gold and 18K packet gold, gold plating gold is a 75%gold alloy jewelry, while 18K gold and gold plating are just made in copper or other metals. The surface of the jewelry surface is wrapped or plated with a very thin layer of 18K gold, and its mark is usually "18kgp". Bags and gold -plated jewelry wears a short period of time. The S990, S925, and S800 are three types. S990 jewelry is also called foot silver jewelry. Its silver content is not less than 990 ‰. The silver content of S925 jewelry is not less than 925 ‰. The silver content of S800 jewelry is not less than 800 ‰. The 18K silver chemical element is AG, which is a silver -white precious metal with low hardness. The common silver jewelry of the market has silver jewelry materials and content marks. The diamond -like diamond -like diamonds are sent to the jewelry manufacturer. The jewelry designers designed drawings, which are set up, polished, and cast, and then inlaid with skilled workers to fully show the brilliance of the diamond and beauty. Common inlaid inlaid. There are four types of methods: claw inlaid method: This is the most common inlay method, mainly consisting of several metal columns, opening a "7" gap above the metal claw, and putting the waist part of the diamond in the gap in the gap. Then use a pliers to add to the claw to fix the diamond groove inlaid method: use the metal wall of the pit on both sides to place the diamond in the pit, and then apply the pressure to fix the diamond. The inlaid mouth of the cylinder is put on the car pit on the wall of the inner cylinder, placed the appropriate size diamond in it, and then pressed the metal edge on the petals of the diamond waist. Fixed diamond. Nail inlaid method: Open a small hole on a metal piece, and then use the diamond seat in a fixed position. Use the metal beside the diamond to push the metal and push it forward to form a small nail. , To inlay solid diamonds. 925 sterling silver. The diamond inlaid method S925 indicates that its silver content is not less than 925 % 21.45 grams per cubic centimeter, and the metal is the highest. Silver white, melting point: 1769 degrees Celsius 4.3 (harder than gold), good ductility (foot platinum) its platinum content is not less than 990 ‰; PT950 jewelry has a platinum content of not less than 950 ‰; PT900 jewelry has a platinum content of not less than 900 ‰; PT850 jewelry's platinum content is not less than 850 ‰; of which PT950 is currently used as long -term gold (mark: G750, AU750 or 18K) gold content is not less than 750 ‰ /foot yellow (mark: G990 or foot gold) gold content No less than 990 ‰ I wish you good luck

religious jewelry religious jewelry wholesale Pay content for time limit to check for freenAnswer, use physical knowledge, measure the density of gold and silver jewelry, and identify the authenticity of gold and silver jewelry. The method is as follows: 1. In the measuring cylinder with a density of the density into the jewelry to be accumulated with 200 ml of aqueous solution, the milliliter of the liquid level rises, that is, the volume of the jewelry is the volume of this jewelry. Here we assume that the size of the jewelry is V cubic centimeters. (Note 1 ml = 1 cubic centimeter) 2. The quality of jewelry that measures density with Tianping is weighed. Put the jewelry in the balance of the balance, place an appropriate amount of method code on the right disk, and adjust the whole code to balance the balance. The quality of the jewelry is the number of grams in indicated by the quality of the method. Here we may wish to assume that the quality of the jewelry is M gram