How to distinguish true gold from false gold
4hw.com.cn: gold has always been an irreplaceable currency. No matter whether the issuing currency appreciates or depreciates, gold, as a global currency, has an unshakable status. Many friends may not know how to distinguish the true and false of gold. Here are some methods to identify yellow gold with the naked eye!
How can the naked eye tell whether gold is true or false
Look at the color
According to the different luster and color of gold, we can roughly distinguish pure gold, K gold, real gold and fake gold. That is, red yellow (yellow red) is the best gold, with a fineness of more than 95%; The positive yellow color is about 80%; The fineness of cyan and yellow is about 70%; Yellow is slightly gray, and the fineness is about 50%.
Therefore, the formula is' seven green and eight yellow, nine five red, yellow and white, gray and half gold '. For jewelry that has been hidden for a long time, there is a saying that 'copper turns green, silver turns black, and gold never changes color'.
Weigh
Gold is about twice as heavy as silver, lead and tin of the same volume. Real gold has a falling feel when held in the hand, while copper or others have only a heavy feeling without a falling feeling.
Flexural hardness
High quality gold can leave traces when carved with pins or nails. More than 97% of the finely colored gold jewelry, after being bent two or three times, wrinkles appear at the bend, also known as fish scale lines; About 95% of the gold jewelry with good quality feels hard when bending, and the fish scale pattern is not obvious.
About 90% of the gold jewelry is of good quality. It is very hard when bending and has no fish scale pattern; Gold jewelry with more impurities can break after bending two or three times; If it is made of raw gold, the bend is broken, and the section has obvious sand shape. When using this method, we should consider the width and thickness of jewelry. The thick and wide ones are harder, and the thin and narrow ones are softer.
Pay attention to these three points when purchasing:
1. Carefully check whether the jewelry has burrs, whether the chain body is straight, and whether the buckle, interface and ear clip are safe. When buying gold jewelry, you should pay attention to the use of solder in order to make the buckle of bracelet and the joint of earrings more firm, and the color of the part with solder should be lower.
2. Observe with the help of relevant inspection tools, such as magnifying glass, so as to better view the jewelry. At the same time, you also need to try on more. Through trial wearing comparison, you can better select the most suitable style.
3. There should be a formal tax invoice for the purchase of gold jewelry. The jewelry document should indicate the name, quality and weight of the jewelry. In addition, it is necessary to remember the gold price of the current day for future query.