Diamond cutting is divided into five levels, namely Excellent, Very Good, good work (good), general cut (fair), and poor. A diamond ring is a must -have item for new people to get married nowadays. A bright and shiny diamond ring is the favorite of fashion brides. The reason why diamond shines is mainly due to diamond cut. In order to release brilliant glory? ? Diamond cutting is important diamond cutting directly affects the fire color of the diamond. The diamonds without processing are not shiny. In order to show a perfect diamond. Diamond cutting will also formulate levels in comprehensive symmetry, polishing, and cutting. GIA diamond appraisal agencies divide the diamond cut into five levels, respectively. Very Good), good work (good), general cut (fair), and poor, different levels of cutting workers give diamond different values. I. as a non -professional person, it is difficult for us to judge the good or bad of the diamond cutting when choosing a diamond, so we need to use the diamond appraisal certificate to solve the problem of how to think of the diamond cut level, but don't want to do it anymore Is it important to ask diamond cutting? As an important factor in determining the diamond fire color and brightness, it is very important! How to choose the diamond cut level All the lights entering the outside are all condensed, and then reflected through all the face of the desktop and the crown, showing bright firecracles. Therefore, the quality of a diamond cutting is not judged according to the shape of the diamond, but the ratio between the diamonds. If the bottom cut is too light, the light can easily leak from the bottom, and if the bottom cut is too deep, it is too deep In the case, light cannot enter the diamonds, neither of the diamond light is presented. Ordinary people observe the cutting of diamond rings through the naked eye and carefully observe the extent of the diamond ring fire. Each diamond identified by professional institutions will issue detailed diamond appraisal certificates to record the diamond cutting level and other information on the certificate in detail to facilitate consumer inspection. On how to judge the good or bad of diamond cutting The edges and corners The ridgeline of the standard circular diamond edges must be three or more than three or more. The cutting of diamond edges is quite strict and precise. If the edges of the diamond are smooth and not straightforward, it may be the imitation of the diamond. The polishing marks The real diamonds can generally not see polishing marks on the surface. Some diamonds that may not be exquisite in workmanship will have some vague polishing marks. Choose high -quality diamonds to choose without polishing. Diamonds. The waistline The waist circumference of diamonds is called "glycated" effect after polishing. This is the most typical cutting feature of diamonds. The polished waist can be seen, most of which are imitation of diamonds. The face If the face of bending, or reflected light deformation, it is most likely imitation. The higher the level of the diamond, the more the diamond can present a more dazzling fire color and brightness, and the appearance is more attractive, so the price also increases accordingly. The technology of cutting experts also determines the cutting level of diamonds.
This depends on whether it is GIA or the certificate of the National Inspection Cut Grade in the GIA certificate. Very good, good = good, fair = general, poor = poor. In addition to this cut, the GIA certificate is also Polish polishing and Symmetry symmetry. The national inspection does not directly explain the inspection item of the cut level. In addition to these three items, it is directly explained that the cutting of the pavilion is more detailed to explain the data of the diamond cutting:
The national standard diamond cutting level table general (general (general (general (general (general (general (general G) Good (VG) Very good (EX) good (VG) General (g) The width ratio ≤ 50.0-52.0 53.0-66.0 67.0-70.0 ≥71.0 10.5 11.0-16.0 16.5-18.0 ≥18.5 The thickness ratio of the waist thickness ratio 0-0.0-1.5 2.0-4.0-7.5 ≥ 8.0 (very thin) (thin) (thick) (thick) (extremely thick) (extremely thick) (extremely thick) (extremely thick) (extremely thick) (extremely thick) (extremely thick) (extremely thick) (extremely thick) (extremely thick) (extremely thick) (extremely thick) (extremely thick) ) The depth of the pavilion ≤ 39.5 40.0-41.0 41.5-45.0 45.5-46.5 ≥47.0 n ≤ 52.5 53.0-55.5 56.0-63.5 64.0-66.5 ≥67.0 Crown angle ≤ 26.0-30.5 31.0-37.0 38.0-40.0 ≥ 41.0 n GIA standard diamond cutting work Grade table
general (good) good (VG) is good (EX) good (VG) general (god) width ratio 47-49 50-51 52-62 63-66 67-69 The height ratio of the crown ≤ 8.0-10.5 11.0-16.0 16.5-18.0 ≥18.5 The thickness ratio of the waist 0-0.0-1.5 2.0-4.0-7.0 ≥ 8.0 n Pavilion depth Ratio ≤39.5 40.0-41.0 41.5-45.0 45.5-46.5 ≥47.0 55.0-57 57.5-60 60-62 ≥65 star small face ratio u003C40 40-45-65 65-70> 70 Crown Horn 26-30 30-31 31.5-36.5 37-38 38-40 Pavilion angle 38.2-38.8 39.8-40.4 40.4-42-42.4 42.6-43 n HRD standard diamond cutting Grade Grade Table is generally good. n The crown height ratio ≤ 8.5 9.0-10.5 11.0-16.0 16.5-18.0 ≥18.5 The thickness ratio of the waist 0-0.5 1.5 2.0-4.0-7.5 ≥8.0 is ≤39.5 40.0 —— 41.0 41.5-45.0 45.5-46.5 ≥47.0 ≤ 26.9 27-30.6 30.7-37.7 37.8-40.6 ≥40.7 The angle of the pavilion ≤ 38.5-39.5 39.6-42.2 42.3-43. Only those who are above VS1 can only talk about collection.
The value of diamonds depends on the diamond 4C grade. The cutting of diamonds is an important criterion for judging. The excellent diamonds are cut off, exuding dazzling light, and the poor diamonds.
There are different standards for cutting of Da carat diamonds. In general, collecting at least one carat starts.
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