The diamond grade is diamond 4C grade, including carat, color, clarity and cut. Carat is the measurement unit of diamond weight, 1 carat = 200mg = 0.2g. With the increase of diamond weight, its value increases geometrically. Colors range from excellent D-level colorless to general Z-level yellowish, and * * * is divided into 23 grades. The lower the grade, the lower the price.
Cleanliness refers to the number of internal defects and inclusions. The higher the cleanliness, the fewer defects and impurities. Cutting gives the diamond a second life. Good cutting can fully reflect the brightness and fire color of the diamond while keeping the weight of the original stone as much as possible.
Extended data
Choice of diamonds:
1, cutting
The ideal diamond should be round, with 58 clear cut edges, which can reflect light to the greatest extent. A high-quality diamond has high value, strong reflection and symmetry, but an inferior diamond may be cut too deep or too shallow to shine.
Step 2 color
The color of diamonds is colorless as the top grade, and gradually comes second with the deepening of yellow.
Step 3 be pure
Almost every diamond contains impurities, even the best quality diamond will have some defects. When its cleanliness is LC level, it can be regarded as flawless level.