The highest grade of diamonds is not H-grade. According to the color grade of diamonds, the highest grade is D grade, which is the absolute colorless grade and the best diamond grade. Diamonds of this grade are very rare and expensive. The color grades of diamonds, from high to low, are D E、F、G、H、I、J、K、M、N。
Diamond color grading
D-level: The color of D-level diamonds is completely colorless, which is the highest level among diamond grades. However, diamonds of this grade are very rare, so the price is also very high.
E-grade: Colorless grade, consumers cannot see any difference with the naked eye. Only professional gemstone appraisers can distinguish the slightly cool elements contained inside diamonds with the help of special machines, so they are also very rare.
F-grade: Both belong to the colorless grade, and jewelry appraisers can see almost no yellow elements, so it is also a high-quality diamond.
G-H grade: close to colorless grade, only by comparing with high-quality diamonds can the difference be seen, so the quality of diamonds is still very high.
I-J level: A small amount of yellow elements can be seen with the naked eye.
K-N level: The yellow element of diamonds can be observed with the naked eye and has no investment value. It is not recommended to purchase.