1, observe the "fire color" of diamonds.
The brilliance of diamonds is also called "fire color", which can reflect colorful and bizarre colored light, especially the soft blue light of Leng Yan. Because of its high refractive index and high dispersion value, diamonds have this special "fire color", especially perfect cut diamonds. Here, consumers can identify the authenticity of diamonds by identifying this special "fire color".
2. Is it sticky to touch the diamond by hand?
Because diamonds have affinity for grease, if they are real diamonds, you will feel sticky if you gently touch their surfaces with your fingers.
3. Observe whether there is temperature.
Wear a diamond on your arm or face. If it feels warm, it is a fake diamond. Because real diamonds don't transfer heat, no matter how you touch them, they are cold.
4. Line test
Place the diamond table face down on a piece of lined paper. If it's a real diamond, you can't see the lines on the paper, otherwise it's an imitation of the diamond. Because the facets of diamonds are generally opaque, real diamonds can't see the lines on the paper.
5, lipophilic test
Natural diamonds have strong oleophilic ability, and a real diamond can leave clear and continuous lines when it is scratched on the surface with an oily pen. On the contrary, when ink is scraped on the surface of diamond imitation, it tends to converge into small droplets, and continuous lines cannot appear.
6. Breathing test
Breathe into the diamond, if the water vapor on the diamond disappears immediately, it will prove to be a real diamond; If the water vapor stays on the diamond for a few seconds and then disappears, it is a fake diamond.
7. Wipe test
Rub the diamond back and forth several times on fine sandpaper. If there are scratches on the surface, it is a fake diamond; if there are no scratches, it is a real diamond. CICC online statement: CICC reprints the above content online, which does not mean confirming its description. It is for investors' reference only and does not constitute investment advice. Investors operate accordingly at their own risk.
8. Identify diamonds according to their chemical characteristics.
When identifying, you need to wet the diamond with water first, and then carve it gently with a pencil. On the crystal face of a real diamond, there is no trace where the pencil crosses, but if it is not a diamond, but a material such as glass and crystal, it will leave traces on the surface. Generally speaking, pencils are used to identify diamonds. This method has high accuracy. But in the appraisal, we should pay attention to some inlaid old diamond jewelry, which is not suitable for water seepage, because if it is inlaid with copper or silver, it is easy to oxidize. In addition, generally speaking, the crystal face of a diamond also needs to avoid contact with oil, dust and objects.
9, specific gravity test method
There is a liquid on the market to measure the specific gravity of precious stones. People can put diamonds into liquid, and the diamonds will sink. A diamond-like gem floating on a liquid is definitely not a diamond.
10, inspection and work
To test the mosaic of diamond ornaments, you need a secret weapon, that is, stockings worn by beautiful women. Because exquisite inlays should fit perfectly, when buying diamond rings or other diamond ornaments from pointed inlays, it is best to use the diamond face of pointed inlays to pass through stockings. If it is very smooth and does not scratch at all, it proves to be an excellent mosaic process and can be purchased with confidence. On the contrary, it means that the mosaic is not tight enough, so it is better to choose another one.
Diamond refers to polished diamond, which is a natural mineral and the original stone of diamond. Simply put, diamond is a simple crystal composed of carbon element formed under high pressure and high temperature conditions in the deep part of the earth. Diamonds are beautiful and rare. They are symbols of love and loyalty, representing eternal love.
On May 17 and 16, Sotheby's held a spring jewelry auction in Geneva, Switzerland. A pair of colored pear-shaped diamond earrings set a new record in the auction history with a total price of about 57.4 million US dollars (about 395 million yuan). This pair of pear-shaped earrings is made in South Africa. Except for the different colors, the appearance is almost the same, weighing about 16 carats respectively. Among them, the dark pink diamond was named "Artemis", which earned US$ 6,543.8+0.55 million (RMB 654.38+0.067 million), and the other diamond was named "Apollo" because of its rare color, which was more than twice as expensive as the pink diamond.
From 2065438 to June 2008, a D-colored IIa diamond weighing 9 10 carat was unearthed in the mining area of Lesotho, an African country, which is equivalent to two golf balls, ranking fifth in the history of diamonds.
References:
Baidu encyclopedia? diamond