Fake gold, gilded, gilded or doped with low color, when bent by hand, is hard in quality, easy to break and not easy to bend.
The second difference is that real gold jewelry will make a "beep" sound when thrown on the table; Fake or poor quality is thrown on the table and makes a sharp sound, jumping higher than real gold.
Difference 3, real gold jewelry is golden in color; Too deep red is imitation gold, and light color is mixed gold such as silver and aluminum.
Difference 4, real gold jewelry can be burned, durable and not discolored; Fake ones don't resist fire, they turn black and purple, and they don't look bright.
Brief introduction of "Jin"
It is a metallic element with chemical symbol Au and atomic number 79.
The simple substance (free form) of gold, commonly known as gold, is a popular precious metal, which has been used as currency, preservation and jewelry for many centuries.
In nature, gold exists in the form of simple substance in gold nuggets or rocks, underground veins and alluvium. Gold is also one of the currency metals.
Gold, a simple substance, is solid at room temperature, with high density, softness, brightness, corrosion resistance and the highest ductility among known metals.
Gold is a transition metal, which can form trivalent and monovalent positive ions after dissolution. Gold will not react with most chemicals, but will be corroded by chlorine, fluorine, aqua regia and cyanide.
Gold can be dissolved by mercury to form amalgam (but this is not a chemical reaction); Nitric acid can dissolve silver and alkali metals, but not gold. The above two properties become the basis of gold refining technology, which are called "separate casting" and "separate casting" respectively.
In general life, some people count some simple ways to distinguish gold as a small formula: weighing, looking at color, judging rhyme, folding soft and hard, and using acid points. Specifically, it can be divided into the following small methods:
1, real gold is soft and incomparable to other metals. So gold can be folded directly by hand. If you can bend directly by hand, and it is easy to bend continuously, it will appear soft. Moreover, there will be traces when real gold is scratched by hard objects.
2. Listen to the sound. Real gold with a purity of more than 99% will beep when thrown on the hard ground, which is disorganized and elastic. Fake or low-quality gold sounds crisp and dull, generally making a "Dangdang" sound, with a lingering sound, and violently beating after landing.
3, the color is really dark yellow, the dividend is fake gold, and the light color is mixed gold such as silver and aluminum. The higher the purity of gold jewelry, the darker the color.
4. The same volume of gold is heavier than silver by more than 40%, copper by 1.2 times and aluminum by 6. 1 times. The same volume, really heavier, fake lighter.
5. Burn the jewelry to be identified (don't make it melt and deform), 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. Generally, the lower the fineness, the thicker the color, and all of them turn black, indicating that they are fake gold ornaments.
6, look at the signs, normally speaking, there will always be some signs behind the gold jewelry. Domestic gold ornaments are purified and prepared according to international standards, and stamped with seals, such as "thousands of gold" or "pure gold". These marks can be used to distinguish the authenticity of gold ornaments.
References:
Baidu Encyclopedia _ Gold (one of the metal elements)
Baidu Encyclopedia _ Real Gold
Baidu Encyclopedia _ Gilded
Baidu Encyclopedia _ Gold