First, how to see the diamond certificate 1, clarity
The clarity of diamonds is 10 times that of jewelry magnifying glass, which is divided into four grades by professionals according to the size of defects. F and IF are the best grades, and even under the magnifying glass of 10 times, no defects can be seen. VVS 1-2 is an excellent grade, and the defects can be ignored. Si 1-2 is excellent, and some defects can be seen.
2. Weight
The weight of a diamond is expressed in carats, 1 carat = 100 minutes = 0.2g Other things being equal, the greater the weight of a diamond, the higher the price.
Step 3 color
The fineness of diamond is D, E, F, G, H, I, J, K, L, M and N from high to low, and it is divided into 1 1 grade. D, e and f are the best grades. Diamonds are transparent and of the best quality, while H, I and J are nearly colorless. Other color grades will turn yellow and the quality is not good enough.
4, cutting work
Cutting is the only factor among the four influencing factors. Diamond cutting is the key factor that affects the luster of diamond. Generally speaking, it is a factor that affects the luster of diamonds. The cutting grades are ID, EX, VG and G from high to low. Domestic diamond certificate cutting is divided into VG and G.
Second, the role of diamond certificate
1, distinguish between genuine and fake diamonds. Diamonds are also true and false, so diamond certificates are like anti-counterfeiting marks. Diamonds with certificates represent that they are real and cannot replace other jewels.
2. Record the characteristics of diamonds. The diamond certificate will record the size and fluorescence reaction of the diamond, which are the characteristics of the diamond.
3. Analyze the quality of diamonds. The diamond certificate records the 4C degree of a diamond, and people can know the quality of a diamond from its 4C degree.
4. Diamond price reference. The quality of diamonds will be recorded on the diamond certificate, so people value diamonds according to the diamond certificate.
5. Save and restore vouchers. Diamonds above 1 carat have the effect of preserving value, and the diamond certificate is the proof of preserving value for future recovery and sale.
Three. Diamond certificate 1 notes. Pay attention to the issuing institution of diamond certificate.
There are two kinds of diamond certificate issuing institutions, one is domestic diamond certificate and the other is international diamond certificate. Compared with domestic diamond certificates, international diamond certificates are more mobile, especially the authoritative GIA international diamond certificate, which is the most credible and trustworthy.
2. Pay attention to the date of the diamond certificate.
When buying diamonds, choose diamonds with a date before the diamond certificate. A diamond only needs a diamond certificate, and the time is close to the purchase date, which means that the identification time is short and the probability of encountering a first-hand diamond is high. Of course, this does not mean that diamonds with long certificates are not worth buying.
3. Pay attention to the coding of the diamond certificate
The code of a diamond certificate is just like a person's ID number. This is a unique code that represents their own identity. People can find this code on the Internet. Note that the diamond has a unique laser code on its waist. Match this code with the certificate code to see if they are consistent.