The psychic diamonds come from Panyu Jewelry Market in Guangdong Province, and this market, including Shenzhen Water Mirror Jewelry Market, has almost accepted the supply of many domestic jewelry brands and is their main supply channel. Therefore, psychic diamonds are not transported by air in South Africa or Belgium at all. Don't listen to the salesperson's bluff. In some cases, salespeople don't know. The blue flame cutter is just a hissing head. If you want to buy cut diamonds, just prepare the following standards.

Diamond cutting ratio:

The measurement items are generally good, better, better and average.

Platform width ratio ≤ 50.051.0 ~ 52.053.0 ~ 66.067.0 ~ 70.0 ≥ 71.0.

Crown height ratio ≤ 8.59.0 ~10.51.0 ~16.016.5 ~18.0 ≥18.5.

The waist thickness ratio is 0 ~ 0.5 (extremely thin)1.0 ~1.52.0 ~ 4.55.0-7.5 ≥ 8.0.

Pavilion depth ratio ≤ 39.5 40.0 ~ 41.041.5 ~ 45.0 45.5 ~ 46.5.

In addition, the world's recognized better cutting works are eight stars and eight arrows.

Eight hearts and eight arrows is the earliest turning method invented by Japanese Maofu in 1977. Today, it has been more than 20 years. In recent years, diamonds with eight hearts and eight arrows have become the mainstream of the market. Judging from the consumers' reaction and love in the market, diamonds with eight hearts and eight arrows are the best among diamonds. Most people agree that the diamond with eight hearts and eight arrows is an excellent rotary diamond, mainly because it has the following main characteristics.

1. Excellent brightness. 2. The fire color is excellent. 3. Excellent optical symmetry. 4. Excellent optical diameter. 5. Perfect and clear heart-shaped circle.

In addition, it is very important that there are several famous diamond producing areas in the world, and the diamonds produced in each producing area have their own characteristics. Therefore, the factor that determines the quality of diamonds is not the place of origin or a certain brand, but its 4C standard, which is an internationally recognized standard for appraising the quality of diamonds and a worldwide unified appraisal standard formulated by GIA, the American Gemological Institute.