Brief Introduction of Jewelry Appraisal Center of China Geo University
Jewelry Appraisal Center of China Geo University was established by Jewelry College of China Geo University. Jewellery Institute was formerly the Gemmology Research Group established by 198 1, and later developed into the Gemmology Research Institute of China Geo University. 1989 was separated from the museum and became an institution directly under the school.
Due to the rapid development of the domestic jewelry market, the jewelry industry urgently needs a group of professional and technical personnel. Over the years, Wuhan Jewelry Institute has devoted itself to the development of jewelry vocational education and academic education, established its own GIC certificate brand, and continuously developed jewelry appraisal instruments for the market.
1992, in order to meet the needs of the jewelry industry and standardize the jewelry market, the jewelry institute began to build a jewelry quality supervision and inspection station in Hubei Province on a solid foundation. The station undertakes jewelry quality inspection of more than 80 merchants in the province, with more than 400,000 pieces inspected every year and about 654.38+10,000 certificates issued. 200 1, in order to serve the national jewelry enterprises, China Geo University (Wuhan) jewelry testing center sub-station was opened in Shenzhen. "If a worker wants to do a good job, he must sharpen his tools first." Without advanced production tools, it is impossible to create high-quality and multi-style products. Therefore, the Jewellery Institute has developed and produced many gemological instruments with advanced technology, excellent quality and complete varieties. They include not only conventional instruments and equipment, but also gem identification instruments that track the latest trends in the jewelry market, as well as jewelry cathodoluminescence instrument, mirror reflector of infrared spectrometer, automatic diamond cutting analyzer, diamond micro-marking technology, and infrared database of gem materials. These high-tech testing equipment have obtained many patents of jewelry identification technology, which are suitable for quality inspection institutions of jewelry products and gems.
1. People's Republic of China (PRC) * * * and China Metrology Certification Certificate (2000)No. (F 1333).
2. (Hubei) Provincial Quality Supervision Literacy (Z-09)-No. of Audit and Accreditation Certificate of Hubei Provincial Bureau of Quality and Technical Supervision
3. Sample pictures
4. Jewelry inspection and appraisal certificate. : No.401312001(0401998 401454).
5. Date: the date when the appraisal certificate was issued.
6. Shape: The shape of the diamond on the sample. Common ones are: round diamond shape, princess square shape, horse eye shape, water drop shape, heart shape and grandmother cut shape.
7. Color level:
The colors of diamonds can be divided into D-E, F-G, H, I-J, K-L, M-N and so on. , and it is also divided into excellent white, white and yellowish white. Color is judged by comparing with "colorimetric stone"
And the color of inlaid diamonds is often influenced by the inlaid materials, shapes and methods, so it is also used as a "reference color".
Color ". The color of inlaid diamonds is graded by colorimetry, which is divided into 7 grades. See the table below for the corresponding relationship with the color grade of inlaid diamonds.
Color grade of inlaid diamonds
D-E
F-G
H
I -J
K-L
Male
& lt ordinary
The color grade corresponding to the diamond embedded in the drill bit.
D
E
F
G
H
I
J
K
L
M
ordinary
& lt ordinary
8. Total mass: refers to the weight of the whole sample. The unit of weight of diamonds is grams.
9. Clarity: Clarity refers to some internal characteristics of diamonds. Under the magnifying glass of 10 times, the clarity of inlaid diamonds can be divided into five grades: LC, VVS, VS, SI and P.
10. Appearance characteristics: description of the appearance of the sample.
1 1. Cutting:
The perfection of diamond processing technology is divided into proportional level and decorative level. Ratio: maximum diameter, minimum diameter, full depth, platform width ratio, waist-thickness pavilion depth ratio,
Measured value of bottom-to-tip ratio. It is divided into three grades: very good, very good and average.
12. Remarks: Other optional contents in the diamond classification certificate.
References:
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