Diamond rings are graded according to the four Cs of the diamond. Carat, diamond weight, the greater the number of carats, the larger the diamond; Color, the color of the diamond, generally the closer to colorless, the higher the diamond grade; Clarity, a measure of the internal defects of the diamond indicators, generally FL clarity level is the best; Cutting is the cutting level of a diamond, including cutting, polishing and symmetry, of which 3EX is the best.
Diamond 4C standard
1. Carat
The diamond weight is calculated in carats (CT). 1 carat =0.2 grams =100 points, 1 point =10 percent, the greater the amount of carat is the greater the weight of the diamond, its quality will be relatively better.
2. Clarity
A grading of the internal and external features of a diamond under a 10x magnifying glass.
Diamond clarity grading from high to low: FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, P1, P2, P3
3. Color
From high to low, the English letters D, E, F, G, H, I, J, K, L, M, N, O, Q, R, S, T, U, V, W, X, Y, Z represent different color levels.
What we usually say is common is the diamond color of the Cape series, that is, the colorless - light yellow series, from the colorless D grade to the yellow Z grade. Colorless is the best, and the darker the tone, the worse the quality.
In the color classification of colorless diamonds, the top color is D color, D-G is a colorless level, G-J is a nearly colorless level, from K down the diamond will gradually turn yellow, basically no collection significance.
4. Cut
The quality of the cutting directly affects the brightness and fire color of the diamond, that is, the problem of whether the diamond is bright or not.
Diamonds are graded from highest to lowest: Excellent -EX, Very Good -VG, Good -G, Fair -F, and Poor -P