Identification of good and bad pearls

1. pearls are kept in the shade, and sparkling pearls are the best pearls.

2. The cleanliness and color of the pearl surface is another factor that determines the value of the pearl.

The bigger and rounder the pearl, the more valuable it is.

Identification of true and false gems

In the sun, with a light silver basin or white satin as the lining, put the gem at a height of about five inches.

Let the sun shine, if the light that penetrates the gem appears on the lining with the silver wing of Venus, you can draw a conclusion.

This is true, if it is a fake gem. A shadow will appear on the lining. If you put a jewel in your mouth,

After a while, if your mouth is full of saliva, you won't feel thirsty, but your mouth will be cold and the gem itself won't get hot.

It can also be concluded that it is genuine.

Emerald Jian Zhen method

There are three ways:

1. Fill a bowl with clear water, and put the gem into the bowl, which can make the whole bowl appear light green and authentic.

2. Put the gem in a copper basin, enclose it with paper, and light the white paper with fire to make the fire green.

It's true. 3. Put the gem into red charcoal, the charcoal will smell everywhere, and the fire will go out immediately. This is the real thing.

Identification of crystal device

Lick it with your tongue. It's freezing. No matter how advanced the real crystal is, there is always a faint water halo in it.

At the edge of the real crystal, the light is pure white, while the fake one is white, but transparent as a mirror.

Diamond identification method

1. The real thing glows green in the dark, like a spark on a wire, and the fake can only emit a small amount of white light.

Or it doesn't glow, or it can cut the glass to identify gold jewelry.

Draw a clear line with hard east.

2. The gold ornaments are thrown on the ground, making a "poop" sound. The falsetto is sharp and bright, and it is truer than the truth.

Kim jumps very high.

3. The true color is dark yellow, the excess dividends are fake gold, and the light color is mixed gold such as silver and aluminum.

4. It's really heavy, but not too fake.

5. True fire doesn't change color, while fake fire doesn't resist fire and becomes dark purple.

6. If it really burns red, put it in water for quenching, and the color will remain unchanged.

Identification of jadeite jewelry

First, pay attention to the gold content. In China, it is all red and pure gold, 80%, 70%, 90%, 100%.

Description: internationally, "K" is used to indicate the gold content, and 24K is pure gold, with a content of about 99.6%.

22K is 9 1.3%, 20K is 83%, 18K is 75%, 14K is 58.3% and 12K is 50%.

Jade ornaments: Real jade is very hard and wear-resistant, and the quality with cracks inside is poor.

Any fake jade, with wrinkles on the surface and bubbles inside, is light in weight, low in hardness and noisy when knocked.

The voice is crisp.

Identification of rare gold jewelry

Rare gold jewelry is an alloy made of copper as the main raw material and adding trace elements appropriately, and does not contain gold.

The appearance is 14-24K gold, with better wear resistance and lighter specific gravity than gold. C20K，

C 18K, C 14K, etc. It means that it is equivalent to 20K, 18K, 14K gold, and the color is almost the same.

And quality is not.

Identification of silver ornaments

1. Specific gravity judgment: The specific gravity of silver is much larger than other silvery white metals.

2. Sound judgment: the sound is weak when it falls on a hard object.

3. Color judgment: The real silver drops on the jewelry surface and remains unchanged after the fire barbecue or nitric acid, and is erased.

The back decoration is still silvery white.

Agate identification

Rub it in the palm of your hand, and the color, shape and taste will remain the same. This is the real thing.

Identification of true and false ivory

Real ivory has some exquisite patterns. If you soak it in vinegar overnight, it will be soft.

Fine craft can be made at will, and the fire can be reduced with equisetum water after the production is completed.

This will be difficult. Without these characteristics, it is not real ivory. Another way

It's ok to cook ivory with marinade, it will soften, and then recover it by the first method.