jewelry displays wholesale miami The doubts of the golden label

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Gold can be made into 24K, 18K ... and other gold jewelry. The jewelry marked "18K" (or G750) refers to the pure gold content of 18 cents, that is, 75%gold plus 25%of other metal alloys (such as silver, tadpoles, zinc, nickel, etc.) A kind of jewelry. 18K gold jewelry not only has the valuable value of gold, but also has the advantages of strong proportion of components and has strong ductility, high hardness, and changeable color. It can be used in jewelry design and can fully play complex and exquisite creative performance. The amazing gold jewelry such as K-Gold, which is amazing in the market, is mostly made from special alloy like 18K gold. In the trend of world jewelry, K gold is the mainstream, and Western fashion people even use the unique and unique K gold jewelry to highlight their personal style; because K gold fashion can always meet the needs of contemporary young people, so it is in this way, so it is in this way, so it is in this way, so it is in this way. The status of the fashion industry is enduring, forming a popular style wearing K gold jewelry.
18K gold contains 75%gold, so it still has the characteristics of strong gold ductility, and it is easy to shape into various shapes. And due to the combined 25%of other metals, the hardness enhances the hardness, and it is not easy to deform or scratch. It can also create a brighter and rich color, so that the jewelry design can have a higher level of artistic performance, so it is widely suffered widely The jewelry industry is favored, and it is used in large quantities in the fine and fine gold jewelry design or gem inlaid. All kinds of complicated and delicate gold jewelry design in the market, such as preparing a mesh, slim -shaped fringed, lace -shaped design, a few chaotic snake patterns or elephant leather design, etc. Essence
If identifying gold requires certain experience. Simply introduce some identification methods.
but it is best to go to the gold shop!
(1) See color: the higher the purity of the gold jewelry, the deeper the color. If there is no gold medal, you can determine the general color according to the following color (based on green gold. The so-called green gold contains only silver ingredients in gold); dark red yellow color is more than 95 %, light red yellow 90-95 % The pale yellow is 80-85 %, the cyan is 65-70 %, and the white light is only 50--60 % white light. The slightly yellow and white are less than 50 %. Generally, Qiqing, Eight Huang, and Jiu Chi can be used as a reference. (2) Type weight: The proportion of gold is 19.32, which is more important than metal such as silver, copper, lead, zinc, aluminum. The volume of gold is more than 40 % heavier than the silver, 1.2 times heavier than copper, and 6.1 times heavier than aluminum. The gold jewelry should have a feeling of sinking in the hand, and the fake gold jewelry feels lightly. This method is not suitable for gold jewelry inlaid.
(3) Look at the hardness: pure gold is soft and low. It can draw light marks with nails. Teeth bite can leave tooth marks. High -colored gold jewelry is low in color. The bending method can also test the hardness, the pure gold is soft, it is easy to bend, the lower the purity, the less likely to bend.
(4) Listening to the sound: Throwing the real gold with more than 99 % to throw it on the hard ground, it will make a tap sound, there is no rhyme or elasticity. The fake or low golden sound is crispy but no dullness. Generally, the sound of "Dangdang" is emitted, and there are surplus sounds.
(5) Burning with fire: Burn the jewelry to burn red (do not melt the jewelry) with the fire (do not melt the jewelry), and observe the color change after cooling. The degree of darker is not pure gold. Generally, the lower the color, the stronger the color, and the darkens are all, indicating that it is a fake gold jewelry.
(6) Seeing the mark: Domestic gold jewelry is all prepared according to international standards, and the killing records, such as "24K" indicate "foot red" or "foot gold"; 18K gold, "18K", indicate "18K" Words, those who are lower than LOK, can not play the K -printed number according to regulations. At present, illegal elements are commonly used to manufacture fake cards and imitation stamps in the society. They use rare gold, Asian gold, and even brass to impersonate real gold. Therefore, the identification of gold jewelry must be comprehensively determined according to the sample to determine the true and false and the quality of the real.
The accuracy of gold jewelry has two common methods.
(1) Testing gold stone method: Select the black test gold stone with delicate texture, use the standard gold medal (pair gold medal) with different gold content (on the gold medal), and then draw the gold jewelry sample you want to identify Sales, remove the impurities with concentrated nitric acid, and find out the traces left on the test gold stones compare with the traces of the tested slices that are drawn, and find the same color as the jewelry sample. The accurate gold content of the sample.
(2) Chemical method: also known as reagent test method. Gold is insoluble in separate nitric acid, sulfuric acid, and hydrochloric acid, and silver and copper ingredients can be dissolved with nitric acid. Take gold decorative sample. Putting nitric acid on a certain part, if gold will not change color, if it is silver products, it will generate silver oxide and turn black; For gold jewelry with a gold content of more than 95 %, test with nitric acid, the surface changes very small.