1, with the highest grade a.

There are many grades of pearls, the highest of which is AAA. AAA is the top grade of pearls, with excellent luster, almost no flaws on the surface and very uniform color.

These pearls are usually large in size and very round. In addition to AAA, there are three grades: B, C and D, and each grade has its own unique characteristics and aesthetic feeling. The luster grades of pearls are divided into luster, luster, reflection and reflection image, with clear lines, among which AAA with the highest luster grade is the top grade among pearls.

2. class B.

Grade B is a grade of pearl, which means that the pearl has a high degree of reflection and can clearly see the image of the object. Compared with grade A, the quality of grade B is worse, and only part of the image can be seen. Grade B is a kind of pearl quality, which is relatively poor.

3. level c

Grade C means that the defects seen by naked eyes are between one-third and two-thirds of the whole pearl area, and the luster is good. The appearance of this pearl can usually see objects, but the image may be blurred and the quality is slightly poor.

4.A-D grade

Grades A-D are the grades of pearls, indicating the luster degree of pearls. Specifically, the surface of A-D pearls is flawed and there are no obvious bright spots, but the bright spots are relatively uniform in the process of reflection. This kind of pearl is generally considered as a high-quality pearl on the market.

5. first-class pearls

First-class pearls refer to pearls with good shape, basically smooth surface, strong luster and relatively uniform size. Its shape is round or nearly round, its weight is above 0.5g, its surface is white or colorful, its luster is dazzling and bright, its surface is like a mirror, its reflection image is clear, and its feel is delicate and smooth.

First-class pearls shine with pearls, giving people a noble and elegant feeling, so they are loved by jewelry lovers.

6. Secondary pearls

Secondary pearls refer to pearls with good shape, slightly flawed surface, average luster and slightly different sizes. Its shape is semicircular and steamed bread-shaped, regardless of size or weight. The surface color is white or colored, the light on the pearl surface is bright and uniform, the reflected image is clear, and the touch is smooth and moist.

Compared with the first-class pearls, the second-class pearls have larger particles, more delicate and shiny surfaces, and the luster is not as good as that of the first-class pearls.