Common certificates in the market can be roughly divided into two categories. One is international certification, such as GRS, GIA and AIGS, which are very authoritative in the whole international jewelry circle.
On the other hand, NGTC and GIC certificates are very common in China, and these certificates are widely circulated in China. And what is the difference between them, many people are not very clear, because there are not a few people who suffer.
No, a few days ago, Sister Bao saw someone complaining on the Internet that she spent more than 20,000 yuan on a ruby in a well-known brand jewelry store, and the sales claimed that the ruby had reached the pigeon blood red level.
But when she bought the gem home, she didn't notice the NGTC certificate attached to it. The above description of color is not "pigeon blood red", but "purple red" She couldn't help wondering: was she cheated?
There are such doubts, naturally because I don't understand the national inspection certificate and the international certificate. Today, Sister Bao takes the NGTC certificate in the national inspection certificate and the GRS certificate in the international certificate as an example to explain the difference between the two certificates ~
1
National inspection and national standards
What is the difference?
NGTC certificate is usually called national inspection certificate. It is a jewelry appraisal certificate issued by the state, and the contents on the certificate are also easy to understand.
GRS certificate is a certificate issued by GRS Gemological Agency in Sweden, which is mainly aimed at rubies, emeralds, golden green cat's eyes and other precious gems, and enjoys high authority internationally, especially in the Asia-Pacific region.
GRS certificates are basically in English. What if ordinary people find it hard to understand? In fact, just pay attention to the contents of these three places ~ Take the following certificate as an example:
This part explains the serial number of the certificate, the issuing time of the certificate, the gemstone varieties submitted for inspection and the appraisal results of the gemstone:
The picture in the middle is the photo of the gemstone submitted for inspection, and the following part is the data of the gemstone: carat number, size, cut, shape, color grade (the certificate used as an example has the word pigeon blood red, which means pigeon blood red, if you see this word on the certificate, it means pigeon blood red) and any optimized remarks:
This part is an introduction to the origin of gemstones ~
The difference between NGTC certificate and GRS certificate mainly includes the following five aspects:
0 1
Different standards
There is a saying that when in Rome, do as the Romans do, and certificates are no exception. The NGTC certificates referred to by certificates from different countries and regions are issued by NGTC Center, the most authoritative jewelry and jade testing department in China, and naturally refer to the standards for gems in China.
GRS certificate refers to the local standards in Sweden, which is inevitably different from those in China, but no matter which standard is referenced, it must be within the internationally unified gem standard.
02
The data description on the certificate is different.
Just like the ruby mentioned at the beginning of the article, why can't you find the corresponding word on the NGTC certificate for the pigeon blood red level claimed by the merchant?
In fact, this is not necessarily because the merchant really deliberately fooled, but because pigeon blood red is a symbol of top ruby, but in the final analysis, it is only a commercial name and will not appear on the NGTC national inspection certificate.
Its rating standards for ruby color are purplish red, red, pink and so on. The certificate received by the buyer reads "purplish red", which is only the most normal expression of ruby color by the testing organization.
On the GRS certificate, you will see all kinds of enterprise names, such as pigeon blood red, cornflower blue, muzuo green and so on. Their description of the color of gems can not only identify them from an intuitive visual point of view, but also test their commercial grade.
Jie Bao Popular Science:
Although purplish red is the highest description of ruby color in NGTC certificate, it does not mean that rubies identified as purplish red must be pigeon blood red.
If further confirmation is required, an international certificate is required. Only when it is identified as "pigeon blood red" on international certificates such as GRS certificate can it be recognized as a real pigeon blood red gem ~
03
The optimized label is different.
Many gemstones will be optimized by heating, which does not fundamentally destroy the structure of gemstones and is completely acceptable. Therefore, both the jewelry industry and major appraisal institutions are recognized, so the NGTC certificate can be marked by default.
The GRS appraisal of optimization processing is more detailed, and the certificate will indicate in detail whether the GEM has been optimized and what optimization means have been adopted.
04
Different prices
Of course, the most intuitive difference between the two is the price. The price of NGTC national inspection certificate is lower than that of GRS certificate. If the guests have no special requirements, most businesses will definitely choose a more cost-effective NGTC certificate.
05
Different recognition ranges
Although the authentication institutions of the two certificates are very authoritative, and both of them have very high credibility in gem authentication, NGTC certificates are mainly valid in China, while GRS certificates can be recognized all over the world.
2
National inspection and national standards
Who is more reliable?
Although there are great differences between the two certificates, in essence, NGTC certificate and GRS certificate are highly recognized and trusted by the public. In the final analysis, they are just "identity cards" to prove the authenticity and quality of gems, and there is no question of who is higher or lower.
In terms of cost performance, NGTC certificate obviously has the upper hand. Generally speaking, if there is no special need, you only need to have a NGTC certificate to buy gems.
In addition, GRS certificates are basically only used to identify bare stones. In addition to the identification of bare stones, domestic NGTC can also issue corresponding certificates for inlaid products. If you want to take out the certificate of inlaid jewelry, it is more appropriate to choose NGTC certificate.
For some people with special purchasing needs, GRS certificate is more suitable, because it can accurately measure the commercial grade and optimization degree of gems. If you want to buy precious stones made of pigeon blood red, cornflower and green wood, the GRS certificate has great reference significance.
In addition to the GRS certificate and NGTC certificate mentioned above, there are many common certificates at home and abroad, with different emphases.
Among the international certificates, Gubyrin is the most authoritative appraisal institution for colorful treasures, GIA focuses on the appraisal of diamonds, and SEFF focuses on the appraisal of pearls;
In addition to NGTC, GIC (certificate issued by China Geo University) is also very authoritative in domestic certificates. Like NGTC, it generally does not specifically point out in terms of optimization.
Sister Bao whispered:
These two certificates are very authoritative jewelry appraisal certificates in the market today. Although certificates look very different, they are not very different in essence.
However, we should also be wary of merchants using national inspection certificates to create text traps and using ordinary buyers' ignorance of certificates to deceive people. In order to avoid being fooled, we have to improve our understanding of certificates ~
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