Diamonds are called "the king of jewels" and are extremely precious. It has the highest hardness and can carve any other gem; It has the greatest "fire" ability of natural gems, high refractive index, incomparable brightness and colorful; It has excellent chemical stability, is insoluble in any acid, and is regarded as a symbol of "eternity".

The preciousness of diamonds makes them the main target of counterfeiting. At present, there are more than 10 kinds of counterfeit goods. It is a big mistake to synthesize cubic zirconia, commonly known as "Soviet diamond". Let me tell you a few simple ways to identify diamonds:

From the processing point of view, most diamonds are processed into 58 polyhedrons, all of which are very flat; Reflective images will never be deformed; How straight and sharp the edges between facets are, and how many edges should strictly intersect at one point. Synthetic zirconia, however, is not as hard as diamond because of its low price, and its facets are not so smooth, and its edges are smooth, and some edges are not completely at one point. Looking at the inside of diamonds with a magnifying glass, most diamonds can see black spots or white stone flowers, while the inside of synthetic cubic zirconia is very pure, and few inclusions are seen.

Some jewelry stores have a small instrument called "thermal conductivity meter", which uses the high thermal conductivity of diamonds to identify the authenticity of diamonds. When the thermal conductivity meter is aimed at the surface of the diamond, if it is a real diamond, it will make a very pleasant sound, and the fake diamond will naturally not scream. Even the real diamonds of different qualities have different values. Pay attention to the following four aspects when evaluating.

Color. The whiter the diamond, the better, and the price with a little yellow tone is much lower. But the rare pink diamond and blue diamonds are valuable.

Clarity. If you can see the impurities inside the diamond at a glance, it is inferior; Carefully found a small package, which is medium; What is extremely difficult to see with a magnifying glass is the top grade.

Size. The bigger the diamond, the higher its value. For example, a small diamond 1 carat (0.2g), the current price is about 1.500 yuan. Then a big diamond with the same quality and weight of 1 carat can be sold for 40 thousand yuan.

Working on it. Diamonds are processed into circles, squares, hearts and olives at most. The value of circle is high, and the processing quality mainly depends on whether the proportion of each part is coordinated. Polishing brightness and so on.