How to distinguish real gold from fake gold? What is the difference between real gold and fake gold?

As a kind of ***, it has good physical properties, which is manifested as: high melting point, up to L064 43 degrees Celsius, "real gold is not afraid of fire" means that it is not easy to melt under general flames. The density is high, 19 31 grams cubic centimeter (18 hours), and it feels heavy to the touch.

Good toughness and ductility, strong conductivity. Pure gold has a brilliant yellow color, but the color changes greatly when mixed with other metals, such as dark red for gold-copper alloys and light yellow or off-white for silver-containing alloys. Gold is easily ground into powder, which is why gold is dispersed in nature, and pure gold jewelry is also easy to be worn down to reduce the weight.

Real gold is heavier than fake golden. But now someone is taking a five-cent coin and hitting it really like it!

Go to a regular brand to buy**.

Put it in the fire and burn it, real gold is not afraid of fire.

100 yuan? Touch the collar of ***.

1) Fire Attack:

Real gold is not afraid of fire refining "After the jewelry is cooled by high temperature fire, if it is still yellow and not deformed, it is **; If it turns black, it is not real gold, but a counterfeit made of other metals.

2) "Water" attack:

That is, nitric acid is used to distinguish the authenticity. Put the jewelry in nitric acid, if it is ** it is safe and sound, there will be no change, if it is copper, there will be green smoke.

In addition, the purity of some traditional older ** jewelry will not be very high, more or less a little silver, or even a little copper (sometimes a little green on the surface), you can put it in nitric acid diluted with 1 times with water, heat and boil for half an hour, take out the jewelry, wash it with water, and the silver and copper on its surface have been removed. If you add a little salt (sodium chloride) to the nitric acid just now, if there is a white precipitate (silver chloride) immediately, it means that there is silver in the jewelry. Please rest assured, this treatment will not damage your ** jewelry, on the contrary, it will make the color of the jewelry more beautiful.

3) Recognize the manufacturer and condition:

**The surface of the jewelry should be printed with the manufacturer and alloy purity (fineness), and the words are clear. If there is no mark on the jewelry, or the mark is blurred, the authenticity of the ** jewelry should be suspected.

4) Check the color and change

**There should be a dazzling red yellow, its luster and color is enduring, the higher the color, the more beautiful the color, so people often say "seven green, eight yellow, nine five red". The so-called ** jewelry, which is falsely known as other multi-metals, can be identified by color.

5) Ear Hearing.

Listen to the sound of the argumentative component. The jewelry is naturally attached from a high place, if it only makes a "horn" sound, and there is no rhyme and no elasticity, it is the purity of 990**. If the sound is long and elastic, it means that its fineness is not high, and the jewelry contains more copper and other metal components.

6) Hand Gripping.

That is, compare the weight by hand. **Specific gravity, higher than silver, copper, aluminum, tin and other metals. The same volume is 40% heavier, twice as heavy than copper, and twice as heavy as aluminum.

By comparing the weight, you can also identify whether the jewelry is counterfeit with other metals. The easiest way is to weigh the weight with your hand and you can know the truth and falsehood. As the saying goes, "press the hand", because the same volume of gold is much heavier than other metals such as copper and aluminum.

7) Tooth bite.

Teeth bite to see real gold. **Low hardness, relatively soft, bite lightly with teeth, there will be marks, other metals do not have this characteristic. Moreover, the higher the fineness of the jewelry, the softer, and the level of its fineness can also be checked by bending.

If the fineness is low, it contains more silver and copper, and it is not easy to bend. This method can be used to identify whether gold jewelry is shoddy.

8) Tongue licking.

Put the gold jewelry in your mouth and lick it with your tongue for a while, then smoke, if there is no smell it is **; If there is a sweet silk flavor, it means that it is coppery.

Buy some industrial hydrochloric acid and put it in to see if it will melt away.

What is the difference between real gold and fake gold is:

1. Fold hardness:

If you really fold it by hand, it may be bent, but it is not easy to break, and if you scratch it with a hard thing, you may still leave traces; And if the fake ** is broken by hand, it may be broken.

2. Weight: Really** is generally heavier, and there will be a feeling of falling in the hand; And the fake ** often does not have a sense of fall in the hand.

3. Sound: When really tapping and throwing, the sound is relatively dull, mostly "poof, poof" sound; The fake ** sound is more sharp and long, usually the sound of "dangdang".

4. The color after the fire:

After it was really burned with fire, the color was still golden; And after the fake ** is burned with fire, it usually turns black.

5. Color: **There is a saying: "Seven green, eight yellow, nine five red, yellow and white with gray and half gold". That is, more than 95% of the fineness is reddish-yellow (yellow-red); The color is about 80% yellow; The color is about 70% blue-yellow; The color is yellow with a slight gray tinge at about 50%; Less than 50% of the color is yellowish and white.

In general life, some people will count some simple methods of distinguishing ** into a small mantra: weigh the weight, look at the color, judge the rhyme, fold the soft and hard, and use acid points. Specifically, it can be divided into the following small methods:

1.The texture of the real ** is softer, which is incomparable to other metals. Therefore, it can be folded directly by hand**, if it can be bent directly by hand, and it is easy to bend continuously, it appears to be soft.

In addition, there will be traces if you scratch it with something harder. 2.Listen to the sound.

When real gold with a fineness of more than 99% is thrown on hard ground, it will make a horn sound, with no rhyme and no elasticity. Fake or low-color** sound is brittle and no dullness, generally makes a "dangdang" sound, and the sound has an aftersound, and beats violently after landing. 3.

The real color is dark yellow, and the red is pseudo gold, and the light color is mixed gold such as silver and aluminum. **The higher the purity of the jewelry, the darker the color. 4.

The same volume is heavier than 40%, twice as heavy as copper, and twice as heavy as aluminum. The same volume, the real one is heavier, the fake one is lighter. 5.

Use fire to burn the jewelry to be identified red (do not melt and deform the jewelry), observe the color change after cooling, if the surface is still the original ** color is pure gold; If the color is darkened or darkened to varying degrees, it is not pure gold. Generally, the lower the fineness, the stronger the color, and all of them turn black, indicating that it is fake gold jewelry. 6.

Look at the markings, normally speaking, there will always be some signs behind the jewelry. Domestic ** jewelry is purified and formulated according to international standards, and stamped, such as "thousand pure gold" or "pure gold". You can distinguish the authenticity of ** jewelry according to these marks.

To identify the authenticity of gold jewelry, in addition to using tools and chemical methods such as gold cards, touchstones, and eating gold tigers, the following simple methods can also be used:

1. Real gold jewelry is soft when bent by hand, easy to bend and not easy to break, easy to straighten when wiped by hand, and there will be traces when scratched with harder things; Fake gold, gold-plated, gold-filled or doped with low fineness, when bent by hand, the quality is harder, easy to break and not easy to bend.

Second, real gold jewelry thrown on the plate, will make a "porphyry" sound; Fake or low-quality ones are thrown on the table with a loud sound and jump higher than real gold.

3. The color of real gold jewelry is golden; The excessively dark red is imitation gold, and the light color is mixed gold such as silver and aluminum.

Fourth, real gold jewelry can be burned with fire for durability and does not change color; Fake ones are not fire-resistant, they will turn black and purple, and they will not look shiny.

It's very simple, why don't you just bite it with your teeth? Real gold is very soft.

Identification requires some experience. Briefly describe some of the methods of identification. But it's better to go to the gold shop!

The so-called lapis gold is only contained); The color of dark red yellow is above 95, light red yellow is 90--95, light yellow is 80--85, blue-yellow is 65-70, the color blue with white light is only 50--60, and the yellowish and white is less than 50. The commonly said seven green, eight yellow, and nine red can be used as a reference. (2) Weight:

** The specific gravity is 19 32, which is heavier than silver, copper, lead, zinc, aluminum and other metals. Like the volume of **heavier than ** more than 40, heavier than copper 1 2 times, heavier than aluminum 6 1 times. **Jewelry should have a sense of sinking in the hand, and fake gold jewelry feels light.

Take a sample of gold jewelry. If nitric acid is placed on a certain part, it will not change color if it is **, and if it is a silver product, it will generate silver oxide and turn black; In the case of copper products, bivalent copper salts are generated and green foam is formed. For gold jewelry with a gold content of more than 95, try it with nitric acid, and the surface changes are very small.

Fineness of jewelry: Fineness of jewelry refers to the percentage of pure quantity in jewelry in the total weight of jewelry. At present, ** jewelry is generally engraved"xk"This indicates the gold content of the jewelry.

Gold content of 18k gold = . x0d x0a1, look at the color. There is a saying in China"Seven green, eight yellow, nine purple, ten red", which means that 7 percent of gold is cyan, 8 percent is yellow and purple, and 24K is full of red.

You can distinguish the real from the fake by comparing the color. x0d x0a2, weigh. **Compared with other metal jewelry of the same size, the weight is large.

X0D X0A3, test hardness. The texture of ** jewelry with high color is soft, and the ** jewelry with low color is harder, and some people use their teeth to bite when determining whether it is true, which is also the reason. The gold-plated brass is very hard, and the strength of the teeth does not bite the mark.

You can also bend it by hand, the real ** easy to bend and not easy to break, and the fake ** is easy to break and not easy to bend. X0D X0A4, acid test. Gold is insoluble in nitric acid, sulfuric acid and hydrochloric acid, while other metals undergo chemical changes when exposed to acid.

x0d x0a5, burn with fire. As the saying goes:"Real gold is not afraid of fire.

Burn ** jewelry with fire, and after cooling, the surface is still golden yellow is true**, if it turns black, it is false**.