Where is the worlds biggest diamond trading centres?

1. Antwerp, Belgium: Antwerp is the world's largest diamond trading center by volume, accounting for over 80% of the world's rough diamond trade. The city is home to the Antwerp World Diamond Centre (AWDC), which represents over 1,800 companies involved in the diamond industry.

2. Surat, India: Surat is the world's largest diamond cutting and polishing center. The city is home to over 5,000 diamond cutting and polishing factories, employing over 1 million people. Surat accounts for over 90% of India's diamond exports.

3. Johannesburg, South Africa: Johannesburg is the world's largest producer of rough diamonds. The city is home to the Johannesburg Stock Exchange (JSE), which is the largest diamond exchange in Africa.

4. Tel Aviv, Israel: Tel Aviv is a major center for the diamond industry in Israel. The city is home to the Israel Diamond Exchange (IDE), which is the largest diamond exchange in the world by membership.

5. Dubai, United Arab Emirates: Dubai is a major hub for the diamond trade in the Middle East. The city is home to the Dubai Diamond Exchange (DDE), which is the largest diamond exchange in the Middle East.