Cut-A diamond that has not been cut and polished is just an ordinary stone. Only through accurate calculation, careful design and perfect cutting can the light be fully refracted from the top surface and the beauty of diamonds be fully displayed.

The way to judge the quality of cutting is to pick up the diamond and stare at the jumping light on it. Exquisitely cut diamonds are dazzling and will not be covered by fire because of inlay or different styles. The level of cutting work is: very good, very good, average.

1, the cut shape is too shallow-the light has not been reflected and has leaked out from the bottom of the diamond. ?

2. The cutting shape is too deep-light leaks from the side of the diamond pavilion.

3, perfect cutting-the light is fully refracted and gathered at the top of the diamond.

High crystallinity, completely transparent and flawless, the bigger the particles, the better. The most valuable diamond varieties are white diamonds, that is, water-fire diamonds, red diamonds, pink diamond diamonds, blue diamonds, gold diamonds and black diamonds with purity above 99. These fine varieties, which weigh more than 3 carats, are expensive diamonds, and the general requirement should be no less than 0.25 carats. The bigger the crystal, the more precious it is. If it weighs more than 100 carat, it will be a world-famous diamond. Because diamonds are expensive, they often encounter fakes or artificial techniques to cover up their shortcomings and raise their grades. Therefore, it is extremely important to identify the authenticity and strictly identify their quality grades.

The difference between diamond and glass powder is that glass imitation diamond is rough in workmanship, soft in nature and easy to wear at edges and corners. After wearing it for a period of time, it often appears different degrees of fuzzing, poor refractive index and dull luster. Put it upside down and upside down, and you can see the fingerprints on your hand. Most of the bottom of the feeder is plated with mercury to increase the reflectivity, but no matter what kind of fake is not as hard as diamond. Although the genuine product has been worn and decorated for a long time, it will not have the slightest fuzzing phenomenon. If possible, the bottom edge of diamond jewelry can be detected with a diamond pen, which is the safest and most reliable identification method.

There are five ways to identify diamonds.

Among all kinds of jewelry, diamond is known as the "king of gems" and is deeply loved by the world. However, when people buy diamonds, because they are not familiar with the characteristics, they are easily lured and kidnapped, causing great losses. For us ordinary people, the simple and feasible methods to identify diamonds are:

1. Pencil identification method After the diamond is wetted with water, scratch it with a pencil, and no pencil marks will be left on the surface of the real diamond. Crystal, glass, tourmaline and other colorless and transparent fake diamonds will leave traces.

2. Pen identification method After dipping the pen in ink, draw a line on the diamond. When a real diamond is observed under a magnifying glass, its surface will leave smooth and continuous ink lines without any broken traces. The lines left by fake diamonds are made up of dots.

3. The hardness of diamond is so strong that it is difficult to leave a notch on it with a blade. In addition, a slight scratch on the glass with diamonds will leave more obvious white marks. Fake diamonds do not have this phenomenon.

4. Drip identification method Wipe the upper facet of the diamond clean and dip a drop of water on the end of the toothpick. The water droplets on a real diamond will take the shape of small round water droplets of medium size. The water droplets on the fake diamonds will soon disperse.

5, optical identification method Real diamonds have the characteristics of single refraction, radiant and dazzling brightness, but you can't see fingerprints when you wear them on your hands. Fake diamonds, such as crystals, have poor dispersion and low refractive index, and fingerprints can be seen through the crystals.