When many consumers buy a lot of gold, they will worry about whether the gold they buy will be adulterated because of the difference in price or the difference in color. Is it worth the price? The following small series will teach you seven tricks to identify whether gold jewelry is blended. false. 1. View the color. Look at the color of gold appearance, as the saying goes, gold is "seven green, eight yellow, nine purple, ten red", because it contains different types of impurities and different compositions and different colors. Pure gold shines, and mixed gold has a little bit of trouble. The jewellery containing gold is 70% green, and the gold containing 80% is yellow. The gold-containing glutinous rice is yellow and transparent, and the gold content is 10%. 2, heavier. The specific gravity of gold is 19.3g/cm3, and the relationship between coloration and specific gravity is large. When the specific gravity is close to 19.3, the higher the pure gold. Whether it is commensurate with the size of the hand by the weight of the hand, the shape is large and light may be adulterated. But generally in the hands, if you feel a little sinking, you can feel that it is real gold jewelry, which shows that the gold body is small and heavy. Be wary of stupid and light ornaments, and carefully identify whether it is a fake or a fake. 3, try hard and hard. The higher the color of gold jewelry, the softer it is, the less elastic it is. The gold is bitten or needled with a light mark, and the hand is folded without broken lines. The low color steel is hard; the heavy blender is elastic, brittle and fragile. Pure gold is soft, generally not used for inlaid jewelry, so the inlaid gold ornaments claim to be 24K, there must be fraud. 4, knocking. Two identical gold ornaments collide, the high color is the voice of the people, the low color is the voice, and the gold is the sound. 5. Reagent method. That is, try 45% nitric acid: gold, platinum, no change, silver, black, copper, green foam. This is because gold and palladium are chemically stable, are not oxidized under any conditions, and are very stable in water, air, hydrogen sulfide or salt, and alkali environments. Gold is hardly soluble in any single acid, only soluble in aqua regia (a mixture of hydrochloric acid and nitric acid in a ratio of 3 to 1). 6. Check the stamping method. Gold jewelry produced by regular manufacturers is covered with gold and manufacturer's mark, such as cover 24K, 22K, 18K and so on. 7. Professional agency testing. If you are not comfortable using the above methods, we can also go to a professional appraisal agency for testing. If the "Thousands of Gold" is doped with antimony or tungsten, a professional precious metal detector can be seen. In addition, there is a method of destructive testing. If the tester can withstand tens of milligrams of wear, dissolve some of the gold, and send it to a high-resolution plasma mass spectrometer for destructive testing, it can also get very accurate results. However, these tests are subject to a certain fee. The above is the seven tricks to identify whether gold jewelry is adulterated. If you are wearing gold jewelry now, you can try it. Satin Fabric,Soft Satin Fabric,Stretch Satin Fabric,Polyester Satin Fabric Shaoxing Linkloom Import and Export Co.,ltd. , https://www.linkloomtextile.com
September 02, 2023