The Dubai Diamond Exchange (DDE) was established in 2004 to facilitate the development of the diamond and coloured gems market. Dubai ranks third behind Antwerp and Mumbai in the leading global diamond hubs in terms of trade, growing from $300 million (Dh1.10 billion) in trade in 2002 to $26 billion in 2016.
In 2018, the value of diamond trading in the city exceeded $25 billion, according to the Dubai Multi Commodities Centre.
Rapid development of the city's trade infrastructure helps create the world's largest diamond trading floor at the Almas Tower, a skyscraper located near the Persian Gulf. The exchange features 41 viewing tables, private cabins, and white crystal windows that allow for accurate appraisal of the color of precious stones.
The Dubai Diamond Exchange has undergone multiple renovations in recent years and now accommodates more than 1,000 companies involved in the trade. The site contains facilities for processing diamonds, jewelery merchants, and an office of the Kimberley Process — the authority charged with ensuring diamonds are ethically sourced.
According to wikipedia