Then the question is coming,how can we know the value of couple heart jewelry find on womenshop. And will not be deceived? The first move, first look at the print!

At present, organizations that can produce internationally accepted jewelry identification certificates can be divided into two categories:

Domestic

1. NGTC (National Jewelry Quality Supervision and Inspection Center)

NFTC is a commissioned inspection service for the society. The national quality jewelery and jade professional quality inspection agency is very authoritative.

2. GIC (Gemological Laboratory, established by China University of Geo sciences)

China University of Geo sciences established the Jewelry Testing Center in 1993,focusing on identification, consulting, training, exhibition, production and processing,and serving the society extensively.

International

1.GIG (Asia Gem Society)

Known for its impartiality and rigor, GIG has testing centers in Shanghai, Beijing,Hubei and Jiangsu.

2. GIA (American Jewelry Institute)

GIA is an internationally renowned diamond appraisal organization established in Los Angeles in 1931. Its Diamond Grading Report and GIA Diamond Processing are considered the world's number one gemstone certificate.

3. IGI (International Gemological Institute)

IGI is the oldest gemological institute, specializing in detailed diamonds in plain language.

4. HRD (Belgian Diamond High Class Council)

HRD is the officially recognized trade industry representing Belgian diamonds. It can be issued with three certificates. The diamond certificate contains a complete description of the quality of the diamond. It is important to distinguish whether the diamond is a natural colored diamond or a imitated diamond!

5. EGL (European Gemological Association)

EGL's mission is to help consumers purchase diamonds and precious stones, and has a certain professional status and popularity in the United States and Belgium.

After knowing these professional institutions, the next step is the inquiry of the certificate. In the browser search bar, enter "certificate query" to find a query website similar to the following figure. Cautious treasures can check and compare through a number of different websites.

This is the first measure to identify the certificate. Any of the above signs is valid.Many forever friends jewelry inspection and inspection agencies have the above sign sat the same time. In other words, they have "multiple insurance". Therefore, the certificate should not be seen, the sign behind it is the key!

The second measure: look at the test content

Due to the large number of jewelry categories, we listed a few common ones.

1 Diamonds: Generally, it is a graded certificate, which is a detailed labeling of the diamond "4C". Especially the clarity level and color level are important, which is related to the value difference of your diamond. Then most of the domestic certificates will not be accompanied by the cut-off scale chart when marking the cut,and the international certificate will be available.

2 Precious metals: generally the purity of the metal is detected, so it is a purity certificate, which will indicate the specific type of precious metal and its purity content.

3 Colored gemstones: Colored gemstone does not have a strict classification in the domestic certificate. The role is to determine the variety of this colorful treasure and mark whether it is natural. It depends on the name of the variety, the description of the color, and the description of the characteristics of the package. These items are all important.

4 Jade: It is also a certified variety. However, some jade stones with a fine texture will have different descriptions of the characteristic inclusions. The coarse structure maybe the "grain structure" and the finer structure may be the "fibrous structure". More importantly, for natural jade, the certificate will not be marked with the word "natural" because since the certificate can be issued, it means that it is already natural jade. If it is a processed product, it will not issue a certificate, but it does not exclude some. The "Resolution" will be marked in the remarks column, so the remarks column should also be clearly seen.

Special attention: the place of origin does not participate in the test. For example, the origin of jade, which mine is produced from it, will not be reflected in the certificate.The certificate can only detect what kind of this is.

Third move, signature of the appraiser

The certificate of authentication must be signed and confirmed by two appraisers, one is the appraiser and the other is the checker. Both seals should print on. Strict should be a stamp, and the above font can be clearly identified.

The above is the identification method of the black blue mens jewelry identification certificate. We also remind everyone that if you encounter a foreign certificate, you should be cautious.

Every year during the tourist season, there will be many people who go to the so-called "gem producing area" to buy gems, and then take out the certificate issued by the place of origin. Because foreign certificates are mostly in English, many people are very easy to be fooled when their English is not very good,