How to tell the true and false gold

Gold jewelry refers to jewelry made with gold as the main raw material. Nowadays, there are many illegal vendors who use some other metals to pretend to be gold. Then how do we consumers distinguish the authenticity of gold? Gold jewelry refers to the production of gold as the main raw material Jewelry. Gold jewelry can be divided into pure gold and k gold from its gold content. The gold content of pure gold jewelry is more than 99%, up to 99.99%, so it is also called 'Nine-Nine GoldThere are also many illegal traders who use other metals to pretend to be gold. So how do we consumers distinguish between true and false gold? There are many ways to identify gold jewelry, including looking at the color, weighing, listening to the sound, folding hardness, stone grinding, comparing the brand, using acid points, and setting the color. The first four sentences rely on eyesight and feel; the last four sentences need tools and reagents. There is also a common method-burning with fire. 1. Looking at the color and luster, you can roughly distinguish pure gold, k gold, real gold, and fake gold according to the different luster and color of gold. That is to say, gold is preferably red yellow (yellow-red) with a fineness above 95%; normal yellow fineness is about 80%; cyan fineness is about 70%; yellow is slightly gray with a fineness of about 50%. Therefore, there is a formula for 'seven greens, eight yellows, nine reds, yellow leucorrhea, gray and half gold'. For jewelry that was first released for a long time, there is a saying that 'copper turns green, silver turns black, and gold never changes color'. 2. The weight of gold is about twice as heavy as the same volume of silver, lead and tin. Real gold has a feeling of falling in the hand, while copper or other materials only have a heavy feeling but no feeling of falling. 3. When the gold jewelry with high sound quality is knocked or thrown to the hard ground, it will make a dull low sound of 'puff, puff, puff, puff, puffThe bigger, the sharper the rhyme and the older, the worse the color. Fake or low-quality gold has a crisp sound without dullness. It generally makes a 'dangdang' sound with a reverberant sound, which beats violently after landing. 4. Fold the gold with high hardness and color, and scratch with a pin or nail can leave a trace. Gold jewelry with a fineness of more than 97%, after bending two or three times, wrinkles appear at the bend, also called fish scale pattern; 5. Use acid points to grind out the gold path of the identified jewelry and the matching brand on the touchstone, and use a glass rod to point Try nitric acid on the gold road. Because the gold element is chemically stable and does not react with acid, the color does not change. If it is not gold or pure gold, the golden way disappears or changes. 6. Use fire to burn the jewelry to be identified (don't melt the jewelry), and observe the color change after cooling. If the surface is still the original gold color, it is pure gold; if the color becomes darker or blackened to varying degrees, it is not Pure gold. Generally, the lower the color, the thicker the color, and all become black, indicating that it is fake gold jewelry. It will be quenched into water after it is really red, and the color will not change. The real ones will not change color when exposed to fire, the fake ones will not be resistant to fire, they will become dark purple and not shiny. How to distinguish true and false gold? When buying gold jewellery, you should recognize the three marks: the name of the manufacturer, the name of the material, and the content of the material. If you have any questions about the jewelry you bought, you should send it to the inspection agency for identification in time to protect your rights. Previous: Why are diamonds expensive Next: How to check the origin of diamonds