Diamond CT generally refers to the mass (weight) of a diamond, and CT stands for "carat" or "carat" in Chinese. It is used to calculate smaller gemstones and is also one of the 4C standards for diamond identification. As a unit of measurement for gemstones, the conversion formula in current international standards is 1ct=0.2g=200mg. The larger the carat number, the heavier the diamond.
Diamond Identification Standard 4c
1. CARAT (Carat)
The size unit of a diamond is carat, with 1 carat equals 100 cents. Generally, people may think that the larger the diamond, the more expensive it is. However, it is important to consider the 4C parameters of a diamond, and size is one of them.
2. COLOR (color)
Diamond colors are divided into D-Z, with D, E, and F being the optimal grades. The higher the grade, the closer it is to colorless, and the later it becomes more yellowish. G. H, I, and J are suboptimal and close to colorless. Subsequent K, L, and M will have some yellow color, while N-Z is basically inferior with yellow color.
3. Clarity
Diamond clarity, also known as transparency, is usually considered a rare and exceptional quality, with F and IF being close to transparency. VVS and VVS2 belong to high-level quality, followed by SI1 SI2、 And I1 I2、I3。 It is rare to see grades I1 or lower on the market, and usually the ones purchased more are those above SI2, which is also of better quality.
4. CUT (Cut)
Cutting is usually divided into five levels: EXCELLENT ideal cutting, VERY GOOD very good, GOOD good, FAIR average, POOR poor, which is the only one in the 4C standard that has always been subject to human influence.