I. Gold Appraisal of Chow Tai Fook
1, see color identification: the higher the purity of gold jewelry, the darker the color. In the absence of a gold medal, the general fineness can be determined according to the following colors (based on cyan gold). The so-called green gold is just silver in gold); The fineness of deep red yellow is above 95%, light red yellow is 90-95%, light yellow is 80-85%, blue yellow is 65-70%, blue white is only 50-60%, and yellow white is less than 50%. The so-called seven greens, eight yellows and nine reds can be used for reference.
2, look at hardness identification: gold pure gold texture is soft, hardness is low, nails can draw shallow marks, bite marks can leave tooth marks, gold jewelry with high color is softer than low color, the more copper it contains, the harder it is, and pure gold texture is soft and easy to bend, and the lower the purity, the more difficult it is to bend.
3, listen to the sound identification: real gold with a purity of more than 99% is thrown on the hard ground, which will beep, rhyme and have no elasticity. Fake or low-quality gold sounds crisp and dull, generally making a "Dangdang" sound, and the sound has a lingering sound, which beats violently after landing.
4. Identification with fire: identify jewelry by burning gold with fire (don't melt and deform jewelry), and observe the color change after cooling. If the surface is still golden, it is pure gold; If the color darkens or turns black to varying degrees, it is not pure gold.
Second, Chow Tai Fook Pearl Necklace Identification
1, distinguished by color: usually colors are translucent jade white, yellow white, light blue and meat red and other natural and very distinctive multicolored fluorescence, which can be selected according to personal preferences, and it should be noted that the size of each pearl is different. If it is the same size, it means that it is a fake made by the machine.
2, from the feel to distinguish: Chow Tai Fook pearl necklace is true and false. People who generally understand will use this method. Real pearls are very cold, even in hot weather, they will feel very cold when touched by hand, and fake pearls will feel sticky, so this method can be used to verify.
3, with fire: the real pearl is still intact on the fire, and the luster is still the same. If it is fake, there will be black smoke and loss of luster.
4. Scrape with a knife: fake necklaces will be colored when scratched, and real pearl necklaces will not leave traces. If the store can't inspect the goods, it means there is a certain problem, so be careful.
Third, Chow Tai Fook diamond ring is true and false
In the market, "cubic zirconia" ornaments are usually used as imitations of diamonds. From the appearance, both of them are very shiny and shine in the light. Discrimination principle: draw a straight line on white paper with a pencil. When two gems are placed on a straight line with their tips facing down, natural diamonds can't see the drawn straight line, while zircon can see the curved arc.
Experts explained: This is because the refractive index of diamonds is the highest among all gems, and diamonds made into jewelry need to be cut better, so almost all the light hitting the cut surface of diamonds is reflected, and almost nothing can be seen when viewed vertically from the tip, while the refractive index of cubic zirconia is not so good, and some light will be missed by reflection, so deformed lines can be seen. However, if you really want to distinguish between true and false diamonds, you must go to a regular testing institution. Chow Tai Fook Gold Jewelry Recommendation >>