Diamond parameters (4C)
The most important weight of a diamond is the carat number , which has a carat premium, that is, 30 points, 50 points, 1 carat, 1.5 carats, 2 carats, 2.5 carats... When these thresholds are reached, the price will increase exponentially , so it is more cost-effective to buy some diamonds below the threshold for the ones you wear, but if you want to preserve the value, try to buy diamonds above the threshold.
The second is the fineness , which ranges from D to Z, with D being the best and Z being the worst. DF stands for colorless, GL is close to colorless, and others are yellowish. But from a practical point of view, diamonds have turned yellow visible to the naked eye since I, and if funds permit, try to buy more than H color, and H is the most cost-effective.
Clarity is the grading of diamonds under a 10x magnifying glass, divided into flawless (LC), very slightly flawed (VVS1\2), slightly flawed (VS1\2), flawed (SI1\2), heavily flawed (P1\2 \3). Because it is the effect of 10 times magnification, we can basically choose SI1 or above from the naked eye for daily use.
Cut encompasses cut, polish and symmetry. This parameter embodies the fire, brightness and dazzling of the diamond. Among them, the cut must be EX grade, followed by symmetry, and EX as much as possible. If the price is right, the polishing can accept VG, but it is best to be EX.
the way of buying
Branded stores: The brand premium is very serious, almost ten times the cost price. It is not recommended for ordinary families to go, but the advantage of branded stores is that they are safe to buy and have good after-sales service. Some branded stores can make up the difference after purchase The method is replaced by another diamond ring.
Diamond customization: As the name suggests, it means assembling diamond rings. Consumers can buy loose diamonds and ring settings, and then inlay them into finished diamond rings. Because consumers can find purchasing channels by themselves, although suppliers also charge a part of the money, it is almost only one-fifth of the price compared to brand owners. Example: main diamond 51 points, F, VS1, 2EX, polished VG, 7400. Ring setting customization: small diamond processing technology plus inlay 2100, three certificates. The same diamond is more than 50,000 in brand stores.
Distinguish between true and false
The GIA certificate is the most authoritative, but not every diamond has it. It is recommended to ask the merchant to do a test. Certificates issued by other national monitoring centers are also acceptable.
Then you need to consider the test time of the certificate. Some certificates have been tested many years ago. They may be second-hand diamonds, but the merchant will definitely tell you that they are backlogged and sell them to you at the price of new diamonds. If the price is reduced a little, the general second-hand diamonds should be at least half the price, because diamonds represent the unswerving love, and the sold diamonds will definitely not have this symbol.
The certificate inspection time within the past year must not be second-hand diamonds? Not necessarily, the merchant can take the diamond to retest, and the time on the certificate will be updated, so it is impossible to completely judge whether it is a second-hand diamond.
Suggestion: For diamonds that have been tested for a long time, ask the merchant to take you to an authoritative organization for testing immediately after purchase. As long as the detected parameters are consistent with the previous certificate, it can basically be judged that the diamond has not been damaged in this long period of time. You have not been deceived. As for whether it is a second-hand diamond, you must maintain a good attitude.