Antwerp is known as the "Diamond City", the city 80% of the population were engaged in diamond and related industries. Antwerp Diamond Cutting, processing and sophisticated, exquisite and therefore I "Antwerp cut" also known as the "standard Diamond Cut" highly regarded. Tel Aviv has a long history of diamond processing, but also the contemporary Cutting one of the most famous diamonds, particularly known for fancy cut. New York is the world's financial and trading center, a large number of well-known jewelers are gathered here, due to costly human resources in New York, generally more than three karats of processing a large drill-based. Mumbai, India, in recent years, new diamond processing center, but the Indian Grinding 0.20 karats of diamonds, mostly about the small drill, poor quality, Grinding process is relatively normal.