Antwerp, Belgium-The exquisite diamond processing center Antwerp is a world-famous diamond processing center, which has become the "diamond capital" of the world since the middle of the15th century. 80% of the residents in this city are engaged in diamond and related industries, and most of the processed diamonds are used for export. Due to the duty-free import and export of diamonds in Antwerp, diamond merchants from all over the world have come to trade, making Antwerp always occupy the throne of the world's largest diamond center. Antwerp has the best diamond polisher in the world. They adopted the "Antwerp cutting" technology, which enjoys a reputation of five centuries, to cut out the shapes of 33 upper faces and 24 lower faces, making the diamond more perfect and fully embodying the crystal brightness of the diamond. It is said that seven of the 10 diamonds in the world are cut by Antwerp craftsmen, so the "Antwerp cutting" technology has become the universal standard all over the world.

Mumbai, India —— The center of small diamond processing, India has a long history of diamond cutting, but its modern diamond processing developed relatively late. India's diamond processing output value from 65438 to 0966 only accounts for 1.9% of the world. In the 1980s, India's modern diamond processing has achieved rapid development, and by 1992, its diamond processing output value has accounted for 35%-40% of the world. However, due to semi-automatic processing, the labor cost is low, and the polished diamond has poor effect, thick waist and poor symmetry, which affects the fire color. Therefore, the diamonds processed are mainly small diamonds, generally within 20 minutes.

New york, USA —— The large-grain diamond processing center in new york, USA is a world-famous large-scale diamond cutting center, where many well-known big jewelers gather. The diamond processing center in new york has more than 400 skilled cutters and about 2,000 diamond dealers. New york Diamond Center has few cutters and grinders, small processing area and exquisite diamond processing. However, due to the high labor cost, the salary is calculated at tens of dollars per hour, and the cutting cost is high, so it mainly processes large diamonds above 1 carat, and the difficulty and accuracy of diamond cutting are world-famous. American-cut round diamonds have 58 faces, the sharp bottom is polished into a transparent octagon, and the waist is polished into a transparent facet.

Tel Aviv, the exquisite colored diamond processing center, has a long history of diamond processing in Tel Aviv, and it is also one of the most famous diamond cutting and grinding places in contemporary times. Especially famous for fancy cutting, 40% of round diamonds and 70% of fancy diamonds in the global diamond and jewelry market are cut and ground here, 10 points to 50 points. However, the processing level is very uneven, and traditional tools are often used for polishing. Some diamonds have rough waist edge, poor symmetry, irregular pavilion shadow and deep and shallow bottom angle, which affects the fire color of diamonds to some extent.