Short answer
Almost every diamond that reaches a New York counter has passed through Gujarat at some point, whether or not the buyer ever hears the name Surat. Surat, in the Indian state of Gujarat, is widely recognized as the world's largest center for cutting and polishing diamonds, with a very large share of the world's diamonds by volume passing through workshops there.
Why Surat matters so much
Surat, in the Indian state of Gujarat, is widely recognized as the world's largest center for cutting and polishing diamonds, with a very large share of the world's diamonds by volume passing through workshops there. What started decades ago as a lower-cost alternative to European cutting centers grew into a specialized industry employing a huge workforce and developing real technical expertise over generations.
This scale means Surat can process both small, high-volume commercial diamonds and larger, more valuable stones, giving it a role in nearly every price tier of the global market rather than a single niche.
Mumbai's role as a trading hub
While Surat dominates cutting and polishing, Mumbai functions more as India's trading and export hub, home to major diamond trading exchanges and the businesses that move stones from Surat's workshops into global markets, including New York. Mumbai's role is less about physical manufacturing and more about deal-making, grading logistics, and international distribution.
Together, Surat and Mumbai form a pipeline: rough diamonds arrive, get cut and polished in Surat, and move through Mumbai's trading networks out to cutting centers, wholesalers, and retailers worldwide.
What this means from a New York vantage point
When I talk to buyers about where a diamond has been before it reaches a setting on 47th Street, India is almost always part of that story, even for stones ultimately sold as part of a New York or European brand. Understanding this doesn't change how you should shop, but it does explain why global diamond pricing and availability can shift with events in Gujarat's cutting industry, from labor conditions to seasonal slowdowns.
It's also a reminder that the diamond trade is genuinely global and interconnected, something worth knowing if you ever hear claims about a stone's origin that sound too simple or too exclusive to be accurate.
Ethics and sourcing conversations
As with any large manufacturing industry, labor and environmental practices in diamond cutting have drawn scrutiny over the years, and reputable buyers and sellers increasingly ask questions about sourcing and working conditions along the supply chain. It's fair to ask a jeweler what they know about where a stone was cut and polished, even if the honest answer is often several steps removed from the retail counter.
This is also part of why some buyers choose lab-grown diamonds or diamonds with clearer chain-of-custody documentation, and it's a legitimate consideration alongside price and appearance.
What to remember
- Surat cuts and polishes a very large share of the world's diamonds.
- Mumbai serves as India's major diamond trading and export hub.
- Most diamonds sold in New York have passed through this Indian pipeline at some point.
- It's reasonable to ask jewelers what they know about a stone's sourcing chain.
Frequently asked questions
- Why Surat matters so much?
- Surat, in the Indian state of Gujarat, is widely recognized as the world's largest center for cutting and polishing diamonds, with a very large share of the world's diamonds by volume passing through workshops there.
- What should you know about mumbai's role as a trading hub?
- While Surat dominates cutting and polishing, Mumbai functions more as India's trading and export hub, home to major diamond trading exchanges and the businesses that move stones from Surat's workshops into global markets, including New York.
- What this means from a New York vantage point?
- When I talk to buyers about where a diamond has been before it reaches a setting on 47th Street, India is almost always part of that story, even for stones ultimately sold as part of a New York or European brand.
- What should you know about ethics and sourcing conversations?
- As with any large manufacturing industry, labor and environmental practices in diamond cutting have drawn scrutiny over the years, and reputable buyers and sellers increasingly ask questions about sourcing and working conditions along the supply chain.