The standard proportion of platinum is 2 1.4g/m3, but the proportion of congener elements is nearly doubled. It is recommended not to accept pure gold jewelry with too light a proportion.
Jewelry is completely solid and must not be hollow or partially hollow. After cutting, I found that the ring was completely solid. Don't mistake it for saying that the ring is hollow. The ring is indeed hollow, but it is limited to the finished products made by old-fashioned hand workshops, and it is usually more gold than gold. Because of the hardness, the interior can't be completely hollow, so the hollow situation can be basically ruled out.
Color: black-gray, dark, and the color of platinum is usually light gray. Platinum will turn black no matter how old it is, unless palladium is added to increase the brightness of jewelry. Generally speaking, platinum is difficult to be oxidized, even if the color of an old aluminum pot is oxidized, it will never turn black. Technology: poor, the same pattern is asymmetrical left and right, the ring looks poor, and the surface has the word "forbearance", like an ornament that has not been cleaned for a long time, but the inside of the ring is smooth, and there is no trace of wearing it, especially the bottom of the ring that is in contact with friction is very smooth, which makes people wonder how there is such a big difference between the inside and outside of the same ornament.
Generally, people from other places come to pawn, and it is usually more direct to abandon pawn. Now, there are no shifts for eating, and we will fish in troubled waters in the morning. All time periods should be given enough attention. In Shanghai, many old pawn shops have been cheated, so be careful.
Second, palladium (posing as platinum) material: palladium, which is also completely platinum-free; Specific gravity: 5.94g/m3, the standard ratio of platinum is 2 1.4g/m3, but the specific gravity of congener elements is nearly doubled. It is recommended not to accept solid platinum jewelry with too light weight.
This kind of jewelry is completely hollowed out, and this kind of hollowed-out style is very common, including necklaces and necklaces of this style bought in shopping malls now, most of which are men's, and sixty or seventy grams are very common. But obviously it feels very light, not as heavy as platinum.
Color: bright, silvery white and platinum are usually light gray, and new ornaments are usually brighter, which is different from old platinum and new platinum without dark gray logo. It is difficult to distinguish colors, mainly by hand feeling and experience, and then by instruments.
Technology: The technology is good. The jewelry is new and has been useless for a long time. However, if we carefully observe the S-shaped clasp of the necklace, it is obvious that the steel seal logo of "PD950" is easily confused with that of "PT950", which is also a marketing strategy game played by many merchants in the market. The material properties of palladium and platinum are very similar. Platinum is not only harder than palladium, but also more antioxidant than palladium. Gradually widening the gap with palladium, from the original market price of 173 yuan/g to the current market price of 289 yuan/g, up nearly 100 yuan, while palladium only stays at 80-90 yuan/g. In view of this, unscrupulous jewelers who have a lot of profit margins use platinum and palladium in the new era. Li is stiff, but with the passage of time and the vigorous promotion of platinum series jewelry by the World Platinum Association, it will be difficult for these palladium jewelry to get rid of real platinum soon, and they gradually withdraw from their short-lived market. Therefore, after these ornaments are consumed by customers, customers still don't know that they are substitutes, so pawnbrokers should look at the steel seal clearly. In addition, some foreign enterprises also deliberately paste the words PD or change it to PT, which also happens from time to time, so be careful when operating hollow platinum necklaces with too light proportion!
4.24K gold-coated silver (pretending to be gold)
Material: 24K gold-coated silver; Specific gravity: about 4.3g/m3.
The standard ratio of gold is19.3g/m3.
This ornament is completely solid and absolutely impossible to be hollow or partially hollow. After cutting, it was found that the bracelet was completely solid. Don't mistakenly think that bracelets are all hollow, and the technological requirements of bracelets are complicated. Usually, it is basically impossible to form a hollow bracelet at one time after casting, and sewing is always needed. Because it is impossible to be completely hollow inside considering the wearing hardness, it can basically be ruled out that the bracelet is hollow in a completely closed situation. Color: yellow, the color of gold is relatively easy to distinguish from other metals. No matter how old gold is, it will never appear silvery white. Unless under special circumstances, when gold comes into contact with metallic mercury, the surface of the gold object will turn white, which is close to the color of silver. However, after annealing, the original properties of the material are still yellow, and no other chemical changes will occur inside. Technology: poor, there are 9999 and Shanghai Laofengxiang's grinding lines in it, which are vague and illegible. Generally speaking, it is considered as opening the board and filling it by hand. The work of jewelry is rough, and there are no traces of polishing. If you lift the surface with a knife, you will find a silver column core of about 0.4mm, which is an obvious gold-covered fraud.
In recent years, it is also a new method of covering silver and gold, using hollow wheat straw necklaces that pawnshops can't measure, and the wheat ears are closely connected. Although it is the latest method, there are still many loopholes. First of all, because of the process, the gold-plated layer can't be very thick and thin, so it's easy to find the white core and the tricky inside of the knife by paying attention to the wear of the gold-plated skin between wheat ears for a long time.
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