Diamonds are regarded as the most precious gemstones in the world with its crystal clear, dazzling and hard quality. It is known as the "king of gems". People see it more as a symbol of love and loyalty, set in rings, pendants, bracelets, earrings, and fly into the homes of ordinary people. Diamond jewelry is dazzling, how to identify the true and false of diamonds, and distinguish the quality of diamonds?
Mr. Zhu Lei, Assistant General Manager of Hefei Snor Jewelry, introduced the following methods:
First, how to identify the true and false of diamonds
1. Hardness test method: Diamond is the hardest naturally occurring substance. There is nothing to mark on the diamond. If it can mark the trace, it is not a true diamond.
2. Thermal conductivity test method: Put the diamond to be identified on the glass and breathe a breath. If it is a diamond, the water mist on the surface should evaporate faster than the water mist on the glass. This is because the diamond has high thermal conductivity. .
3, lipophilic test method: the use of diamonds on the fat affinity characteristics. No matter what kind of fakes, since they are to be fake, the surface is bright as a mirror, and most of them have a lustrous color. As long as you touch it with your hands, the real diamond will immediately become a layer of grease, and the brightness will be weakened. If it touches it, it will still be shiny. It may be a fake diamond because of its poor affinity for fat.
Second, how to distinguish the quality of diamonds
The international "4C" evaluation method is used to distinguish the quality of diamonds. “4C†refers to the weight, color, clarity, and cut of the diamond.
1. Weight: 1 carat is subdivided into 100 points. The heavier the weight, the higher the diamond value. Common diamond jewelry on the market is generally between 10 minutes and 50 minutes. More than 20 points of preservation is better.
2, color: starting from D, E, F, G, H, I, J, K, L, M, N a total of 11 commonly used color grades, D color is the top color. DF is a colorless file, GJ is a near-colorless file, and KN is a yellowish file. The higher the color, the higher the value, and the lower the value, the lower the value. Recommended colors above I and J.
3. Clarity: The highest clarity is FL, which means completely clean, followed by IF (internal clean), VVS (very fine internal ç‘•ç–µ), VS (very slight ç‘•ç–µ), SI (slight ç‘•ç–µ), I (unclean). Generally, the price/performance ratio of VS and SI is the highest, and the clarity of the SI level is hard to distinguish with the naked eye.
4, cut: a round diamond, generally use the standard platform width ratio, pavilion depth ratio to evaluate it. FR is a general cut, G is a good cut, VG is a good cut, EX is excellent cut, ID is a perfect cut. G-cut diamonds in daily life can produce good results, ID is extremely rare, and EX cuts are rare.
Third, verify the diamond ID card
Under normal circumstances, each diamond has an "identity card", and all domestic quality and technical supervision bureaus have special inspection and appraisal institutions. Each identification result will be uploaded to the official website for verification. Fake diamonds are not found online.
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