Surat: The World's Diamond Cutting Capital

Imagine a single mid-sized Indian city processing and polishing the vast majority of diamonds sold anywhere in the world, natural and lab-grown alike, a concentration of a single specialised skill more extreme than almost any other manufacturing hub achieves in any industry globally. That city is Surat, Gujarat, which processes and polishes more than 80% of the world's rough diamonds, and, according to the Gem & Jewellery Export Promotion Council, more than 95% of the world's lab-grown diamond polishing specifically.

This dominance was built over decades around natural diamonds, generations of Surat's workforce developed genuinely specialised cutting and polishing skill, precision work requiring both technical training and accumulated craft experience that's genuinely difficult for other locations to replicate quickly, which is exactly why global diamond trading and mining companies kept sending rough stones to Surat for processing rather than building cutting capability closer to their own mines.

That same specialised skill base is precisely why Surat pivoted into lab-grown diamond processing so effectively once CVD-grown rough diamonds, covered elsewhere on this site, became commercially available at scale, the actual cutting and polishing expertise required is broadly similar regardless of whether the rough stone came from underground or a CVD chamber, letting Surat's existing workforce and infrastructure adapt rather than needing to build an entirely new industry from scratch.

Surat's near-total global dominance in this single specialised craft is also exactly why the city's fortunes move so directly with the industry's broader swings, covered elsewhere on this site, when US tariffs hit Indian diamond exports or when lab-grown prices collapse, the impact doesn't spread thinly across many cities and countries, it lands concentrated and heavy on this one city's workforce and local economy.