The quality of the diamond ring is mainly determined by the four C standards of the diamond: weight, color, clarity, and cut. The diamond color is divided into 23 grades from high to low according to D to Z; Diamond clarity from flawless to inclusions is divided into 11 levels, of which FL is the highest level; The cutting of diamonds is divided into 5 levels from good to bad according to EX to P; With the other three conditions being equal, the higher the number of carats, the higher the grade of the diamond.
1. carat
According to international standards, the weight of the diamond is expressed in carat (CT) : 1 carat =100 points, in the case of the same color, clarity and cut shape, the price of the diamond is proportional to the square of the weight, the greater the weight of the diamond, the higher the value.
2, color (color)
The Gemological Institute of America has divided the diamond color from D to Z according to the amount of yellow elements contained in the diamond, a total of 23 grades. The higher the grade, the more expensive the price. The highest grade is D, which is also the most valuable; The lowest grade is grade Z, which is not recommended to buy. D, E and F are colorless grade, G, H, I and J are nearly colorless grade, and the color of diamonds after k is yellow; Where H color is standard white.
3. clarity
According to gia standards, clarity grades can be divided from top to bottom: FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, I1, I2, I3. Where FL is flawless grade, there are no flaws and inclusions under a 10x magnifying glass, and Grade I diamonds can already be visible to the naked eye. The clearer the diamond, the brighter the diamond looks.
4. cut
Cutting generally refers to the cutting process, according to the quality of the cutting can be divided into 5 grades from EX to P, of which EX grade cutting quality is the highest, the most popular. It should be noted that the common diamond cuts are round, heart-shaped, princess square, etc., but only round diamonds will be marked with cut grades.
Secondly, you can also pay attention to the material of the ring, the ring is generally made of platinum or 18K gold, by contrast, the price of 18K gold is much cheaper than the price of platinum, of course, the quality is lower than platinum.