The Diamond District is between Fifth and Sixth avenues in Midtown Manhattan.
The district was created when dealers moved north from an earlier district near Canal Street and the Bowery that was created in the 1920s, and from a second district located in the Financial District, near the intersection of Fulton and Nassau streets, which started in 1931, and also at Maiden Lane, which had existed since the 18th century.
A notable, long-time anomaly of the district was the famous Gotham Book Mart, a bookstore, which was located at 41 West 47th Street from 1946 to 2004.

The move uptown started in the 1920s when rents in Maiden Lane began increasing drastically as finance and insurance companies moved into the downtown districts.
The district grew in importance when Nazi Germany invaded the Netherlands and Belgium, forcing thousands of Orthodox Jews in the diamond business to flee Amsterdam and Antwerp and settle in New York City.
Most of them remained after World War II, and remain a dominant influence in the Diamond District.
By 1941, the Diamond Dealers Club—an exclusive club that acts as a de facto diamond exchange and has its own synagogue—officially made the move up to midtown as well.

The area is one of the primary centers of the global diamond industry, as well as the premier center for jewelry shopping in the city.
It is one of the largest diamond and jewelry districts in the United States, along with Jewelers' Row, Philadelphia and Los Angeles's Jewelry District, and it is the second oldest surviving jewelry district in the United States after Jewelers' Row in Philadelphia.
Total receipts for the value of a single day's trade on the block average $400 million.
An estimated 90% of diamonds in the United States enter through New York.
There were some 3,500 independent businesses (cutting, polishing and sales) in the district in 2019.
The wholesale business made up most of the $24.6 billion in annual sales in 2019; the industry employed 33,000 people, still predominantly Jews.
Most businesses are located in booths at one of the 25 "exchanges" in the district.
Commission based hawkers are also a common sight and they usually solicit business for stores located on the street level.

Many deals are finalized by a simple, traditional blessing (mazel und brucha, which means "luck and blessing") and handshake.
Retailers with shops line the streets outside.
At 50 West 47th Street is the Gemological Institute of America which trains gem dealers.
One distinguishing figure of the district is the diamond-motif street lights illuminating the corners.
The NYC Diamond District also holds three prominent trade interconnected buildings: the 580 Fifth Avenue Exchange, the DDC, Diamond Dealers Club, and the International Gem Tower.
It is also steps from other landmarks such as Rockefeller Center and Radio City Music Hall.

A January 2020 article in Smithsonian magazine described the Diamond District as follows:
"Visit 47th Street today, and the stylish pedestrians of Fifth and Sixth Avenues vanish.
In their place are elderly, ultra-Orthodox Jews wearing black overcoats and fedoras; south and central Asians with traditional karakul hats; and gaggles of merchants shouting in languages from across the world ... Forty-seventh Street is, in fact, a thick network of middlemen, with diamantaires buying and selling large caches of diamonds much like stock brokers..."
The Diamond District is between Fifth and Sixth avenues in Midtown Manhattan. The district was created when dealers moved north from an earlier district near Canal Street and the Bowery that was created in the 1920s, and from a second district located in the Financial District, near the intersection of Fulton and Nassau streets, which started in 1931, and also at Maiden Lane, which had existed since the 18th century. A notable, long-time anomaly of the district was the famous Gotham Book Mart, a bookstore, which was located at 41 West 47th Street from 1946 to 2004.
The move uptown started in the 1920s when rents in Maiden Lane began increasing drastically as finance and insurance companies moved into the downtown districts. The district grew in importance when Nazi Germany invaded the Netherlands and Belgium, forcing thousands of Orthodox Jews in the diamond business to flee Amsterdam and Antwerp and settle in New York City. Most of them remained after World War II, and remain a dominant influence in the Diamond District. By 1941, the Diamond Dealers Club—an exclusive club that acts as a de facto diamond exchange and has its own synagogue—officially made the move up to midtown as well.
The area is one of the primary centers of the global diamond industry, as well as the premier center for jewelry shopping in the city. It is one of the largest diamond and jewelry districts in the United States, along with Jewelers' Row, Philadelphia and Los Angeles's Jewelry District, and it is the second oldest surviving jewelry district in the United States after Jewelers' Row in Philadelphia. Total receipts for the value of a single day's trade on the block average $400 million. An estimated 90% of diamonds in the United States enter through New York. There were some 3,500 independent businesses (cutting, polishing and sales) in the district in 2019. The wholesale business made up most of the $24.6 billion in annual sales in 2019; the industry employed 33,000 people, still predominantly Jews. Most businesses are located in booths at one of the 25 "exchanges" in the district. Commission based hawkers are also a common sight and they usually solicit business for stores located on the street level.
Many deals are finalized by a simple, traditional blessing (mazel und brucha, which means "luck and blessing") and handshake. Retailers with shops line the streets outside. At 50 West 47th Street is the Gemological Institute of America which trains gem dealers. One distinguishing figure of the district is the diamond-motif street lights illuminating the corners. The NYC Diamond District also holds three prominent trade interconnected buildings: the 580 Fifth Avenue Exchange, the DDC, Diamond Dealers Club, and the International Gem Tower. It is also steps from other landmarks such as Rockefeller Center and Radio City Music Hall.
A January 2020 article in Smithsonian magazine described the Diamond District as follows:
"Visit 47th Street today, and the stylish pedestrians of Fifth and Sixth Avenues vanish. In their place are elderly, ultra-Orthodox Jews wearing black overcoats and fedoras; south and central Asians with traditional karakul hats; and gaggles of merchants shouting in languages from across the world ... Forty-seventh Street is, in fact, a thick network of middlemen, with diamantaires buying and selling large caches of diamonds much like stock brokers..."
47th Street (Manhattan)