IGI Diamond Grading agency introduced

Description:
IGI IGI (International Gemological Institute) was established in 1975, Antwerp World Diamond Centre, is the world's largest independent jewelry appraisal laboratory, the major diamond trading center in the world (Antwerp, New York, Toronto, Dubai, Tokyo, Hong Kong, Tel Aviv, Los Angeles, Mumbai) a total of 12 laboratories, known as "the authority identified by the consumer side." As the world's three leading accreditation body in the true sense of the world's only transcontinental laboratory, IGI solves all the problems laboratory standard high degree of unity, its stability has been widely praised by the industry, the famous Mont Blanc, Cartier, Escada and other international brands have chosen to IGI to provide identification or training services. IGI certificate work well, providing a detailed visual information, and to the waist of the laser engraving diamonds made into a photo printed on the certificate and provide the eight arrows, such as eight weeks, Jiuxing a flower photo darkroom, and for consumers to identify and verify the purchase Diamond. IGI certificate account for the current global certificate market, 35%, a total of 700 professionals. IGI certificate can network query: http://www.igiworldwide.com/IGI% 5FONLINE/Client /
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First, the title part of the certificate:
IGI International Gemological Institute laboratories for the names and logoHEARTS AND ARROWS DIAMOND REPORT for the certificate name (the picture shows the Hearts and Arrows certificate) the upper right corner of the Diamond "and hearts" and "Eight Arrows" and darkroom photo Photo for the actual shooting and paste the certificate. (See "Hearts and Arrows")
Second, the contents of the first part of the certificate:
The first line on the left there will be a Number, this is the certificate number, and the waist of each diamond is laser engraved one correspondence, the only, online searching is, by virtue of this number, and with 10 times the magnifying glass in the diamond waist will be able to see this number, of course, unless the business does not require IGI afterwards. It is also possible. The first line to the right of Antwerp, December 13, 2002 is the certificate issued by the time and place. China is the place to see up to Hong Kong and Antwerp.
Third, the contents of the second part of the certificate:
diamond diamond.yifei8.net

Description, Diamond describes. Natural diamond is a natural diamond. Shape and cut are cut basic shapes, Round and brilliant as the round brilliant type.
Third, the content of third part certification 4C:
Carat weight is the carat weight is the weight of the diamond Luo Dan. 1 gram = 5 carats, 1 carat = 100 points (point). IGI calculated to two decimal places, third place every nine further, such as 67.88 counted 67 points, 67.89 points counted 68; where the weight is 53 points, or 0.53 kt. Clarity grade is clarity diamonds, IGI diamond internal defects according to the nature, amount, showing the extent to diamond clarity into IF-VVS-VS-Si-I several large class, which is divided into VVS VVS1 and VVS2, VS is divided into VS1 and VS2, Si into Si1 and Si2, the net was gradually decreased. This diamond is the IF, which is the best net degrees (10 times the defect is not visible under a magnifying glass). Here is a VS2 clarity corresponding to the right of two diamond patterns, called ploting map, is a graded division marked the location of specific defects, types, etc., and for consumers to check. Common with cloud (Clouds), crystal (containing crystal), feather (feather fracture), pp (tip), etc.. Internal defects are marked with a red, external defects are marked with green. Color grade is color grading, IGI diamonds from colorless to yellow with the letters entirely from D to Z, said the best colorless diamond is D color, E, F, G gradually yellowish, Z color grade minimum. Here the color is E color, D, E, F is very rare. Cut grade is diamond cut. Cut polished diamonds reached is the ratio of the decision of the diamond can show good color and flash fire. Cut is a comprehensive measure of many facets, including symmetry and polish of. IGI will be cut from Excellent to Very Good, Good, Fair, Poor is divided into 5 grades, where the cut is the best Excellent. The following is cut and the two other data relating to: Polish the diamond polishing degree, and symmetry. And cut into 5 different grades. Symmetry Symmetry is a diamond. And cut into 5 different grades. IGI harsh assessment of the cut must be cut to meet the high requirements in order to give Excellent. The following is cut details: Measurements refer to the size of diamond proportion, that is, the diameter * height of the diamond. Because it is hand-polished diamond, sometimes can not guarantee 100% of the round, so there are two different diameter, maximum diameter and minimum diameter. The gap between the general diamond less than 3%. Table diameter is the table size, table width is the ratio of total diameter. Crown height is higher than the crown, that crown high proportion of total diameter. Pavilion depth is the pavilion depth, pavilion depth that is the ratio of total diameter. Girdle thickness is the thickness of the waist, usually from thin to thick thin thick is possible. Total depth is the depth ratio, ie the ratio of height and diameter of the diamond. Culet refers to the diamond tip end of the case, this is pointed, tip income is, in addition, there may be medium secondary end point, large big bottom tip, chopped the end of tip breakage. Here is Diamond Fluorescence fluorescence effect. Most diamonds in the UV light will be blue and white fluorescent, fluorescent colors and most of the diamond itself, with a slight yellow are complementary colors. J color for more than a high color grade diamond, strong fluorescence of the diamonds have a negative impact on the value, for the J-color, low color level and below the diamond, strong fluorescence of the diamond value has a positive impact, while the weak fluorescence was no effect on the value of diamonds. Comments and diamond set out any relevant information related to the quality, such as laser engraving diamond content of the waist, or Hearts and Arrows diamonds, whether through manual optimization, will be listed in this column. The Diamond information: Hearts and Arrows Ideal cut (so far remains the most authoritative IGI Hearts and Arrows Diamond Jianding Zhe), waist lettering (diamond certificate number). Diamond laser inscriptions below the waist of the larger photo, posted on the certificate to facilitate verification. Photo on the right for the IGI laser security signs.

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