Selected according to the 4C criteria, namely color, clarity, cut and carat weight. The closer the color is to colorless, the higher the quality of the diamond, such as D, E, F grade color belongs to the top colorless; In terms of clarity, the less internal impurities, the better, such as VVS (minimal concealer grade), VS (minimal concealer grade) and other clarity grades are higher;
Cutting is the key factor affecting the diamond fire color, excellent cutting can make the diamond more shining, should choose the cut grade of EX (excellent) or VG (very good) diamonds; Carat weight is determined according to individual budget and needs, the greater the number of carats, the rarer and more expensive the diamond.