How Does The Diamond Grade Differ

The grade of the diamond is based on the 4 C standard. 1, the weight (carat, caratage, identification is CT), needless to say, of course, the heavier the better. 

1, CT equals 100 points. 

2, colors (color), the international standard, from the beginning of D, basically to Z, the following is generally used as industrial drilling, which is often said Diamond. 

3, Clarity (Clarity), the international commonly used if, VVS, VS, SI, I respectively interpreted as: A, if perfect, flawless, both under 10 times times the magnifying glass can not see the flaw. 

B, VVS subdivision for VVS1, VVS2, are very minor flaws, both in 10 times times the magnifying glass is very difficult to see the defects of VVS1, it is difficult to see the defects for VVS2. 

C, vs Subdivision for VS1, VS2, are micro-defects, both under 10 times times the magnifying glass is more difficult to see the defect is VS1, more easily see the defect for the VS2. 

D, Si subdivision for SI1, SI2, are small defects, both in 10 times times the magnifying glass easy to see defects SI1, it is easy to see the defects for SI2.

E, I subdivision for I1, I2, I3, all for the naked eye can see flaws, the naked eye can see the defect for the I1, the naked eye easy to see for I2, the naked eye is easy to see for I3. 4, Cut (cut), is the only man-made control. 

Divided into five major items: A, full depth ratio (Depth) 59.3~61.0% for the best ratio, the 52.5~67% is good. 

b, the aspect ratio (table) 53.0~61.0% is the best ratio, the 51~70% is good. 

C, waist Line (girdle) medium for good, thin and slightly Thick for good, Very thin and Thick for general, extremely thin, Very Thick, extremely Thick for poor. D, Tip ratio (culet) None (pointed), very tiny (None), very small (Very Small), Moderate (Medium), slightly larger (slightly Lager), large (Lager), very large (Very Lager), 

Great (extremely Lager), if the bottom tip surface is too small and easy to wear, too big will affect the fire color.

E, the degree of modification (Fish) is divided into polishing (Polish) and symmetry (symmetry), excellent (excellent), very good (Very good), good (good), large to good (Fair to Good), fair (Fair), Poor (Poor). A diamond is a crystalline mineral, which, like graphite, is made up of carbon (chemical element C) in nature. In all natural minerals, the diamond has the highest hardness, although the diamond is hard, because it is brittle, it is also fragile, a diamond crystal can easily be crushed by a hammer. In all substances, diamonds have the highest thermal conductivity. Even metals such as silver and copper are less thermally conductive than diamonds. In addition, diamonds are difficult or do not swell at all when heated. Diamonds burn at temperatures up to 700 to 800. In an anaerobic environment, when the diamond is heated to about 1500, the diamond turns into carbon.