Antwerp's dominance as a diamond centre is one of the most durable commercial facts in European trade history. It began in the 15th century, when Flemish craftsmen developed the first systematic diamond cutting guilds. It survived the disruptions of wars and the Spanish occupation that scattered Jewish and Protestant merchants to Amsterdam in the 17th century. It survived the rise of Amsterdam as a rival centre in the 17th and 18th centuries. It has adapted to the loss of its dominant market share in cutting (now overwhelmingly in Surat) while retaining its position as the world's largest rough diamond trading hub. Approximately 80 to 85 percent of the world's rough diamonds still pass through Antwerp, not necessarily to be cut there, but to be traded, financed, and documented there. : AWDC (Antwerp World Diamond Centre), awdc.be; historical documentation of Antwerp diamond trade

Antwerp: the rough trading capital

The Antwerp World Diamond Centre (AWDC) is the trade association and promotional organisation for Antwerp's diamond industry, headquartered in the diamond district centred on Hoveniersstraat near Antwerp Central Station. Antwerp handles approximately 80 to 85 percent of the world's rough diamond transactions by value, not because it cuts most of the world's diamonds (Surat does) but because the rough trading infrastructure, banking networks, bourse facilities, and institutional knowledge accumulated over five centuries make Antwerp the most efficient location for buying, selling, financing, and shipping rough (AWDC, awdc.be; industry data on Antwerp trading volumes).

Ramat Gan (Tel Aviv): Israel's diamond centre

The Israel Diamond Exchange in Ramat Gan is one of the world's four major diamond exchanges (alongside Antwerp, New York, and Mumbai/BKC). Israel specialises in polished diamond trading and cutting of high-value goods, the Israeli industry moved away from lower-value commercial cutting toward higher-value and technology-intensive operations from the 1980s onward. Israel's diamond industry has a strong tradition in polished diamond marketing and proprietary cutting styles (Israel Diamond Exchange, israeldiamondexchange.co.il; industry data on Israeli polished trading).

New York: the consumer market hub

New York's 47th Street, the Diamond District, is the United States' primary diamond trading and retail centre. Unlike Antwerp (rough) or Surat (cutting), New York's role is primarily polished diamond trading and wholesale distribution to the US retail market. The International Diamond Dealers Association (IDDA) and the Diamond Dealers Club (DDC) organise the New York trade. New York is also the location of Harry Winston, Tiffany, and other major diamond jewellers whose buying power considerably influences market prices (Diamond Dealers Club, nyddc.com; industry documentation of New York's polished market role).

Mumbai and Surat: India's dual-city diamond hub

The Mumbai-Surat axis functions as a single extended cluster: Surat for cutting (90% of world rough), Mumbai for trading, certification, banking, and export. See the Mumbai trade guide and Surat story for the complete picture. The opening of the Surat Diamond Bourse in December 2023 has shifted some trading functions from Mumbai to Surat, but Mumbai's financial and export infrastructure remains central to India's diamond industry (GJEPC data, gjepc.org).

Dubai: the emerging centre

Dubai has emerged as a significant diamond trading centre since the 2000s, positioned at the intersection of Indian Ocean trade routes and serving as a hub for rough and polished trading between Africa, India, and Asia. The Dubai Multi Commodities Centre (DMCC) operates the Dubai Diamond Exchange and has attracted significant diamond trading companies. Dubai's geographic position and tax-efficient structure make it an attractive location for companies serving markets across Africa, the Middle East, and South and Southeast Asia (DMCC documentation, dmcc.ae; industry analyses of Dubai's growing diamond role).

Primary sources

GIA Diamond Grading documentation. gia.edu/diamond-grading. Gemological Institute of America. [Cut grade system; proportion parameters; polishing and symmetry assessment; planning methodology context.]

GJEPC (Gem and Jewellery Export Promotion Council). gjepc.org, Mumbai. [India cutting industry data; Surat manufacturing statistics; export figures.]

Reinitz, I. et al. (2006). "Development of the GIA Diamond Cut Grading System." Gems & Gemology, 42(3), GIA. [Cut grade system basis; proportion parameters and their effect on light performance.]

Sarine Technologies product documentation. sarine.com. [Galaxy family scanning instruments; planning software; mapping of inclusions and proportions for yield optimisation.]