IGI Source connects professional buyers directly with the world's most trusted diamond manufacturers — cutting centers spanning four continents, every partner IGI-verified.
Every manufacturer in our network has been individually vetted for IGI certification compliance, ethical sourcing practices, and production quality. We maintain direct relationships — not broker chains — so you get accurate provenance, real pricing, and a direct line to the people who cut your stones.
One of Surat's most established cutting houses, specializing in precision round brilliants and high-volume melee production. Full IGI grading pipeline on-site.
A heritage Antwerp trading house with deep expertise in fancy shapes and exceptional color grades. Preferred source for D–F colorless stones and bespoke cuts.
Renowned for technically demanding step cuts — emerald and Asscher — where precision faceting defines the stone's character. Decades of expertise in clarity-forward cutting.
A boutique New York studio for high-end custom and bespoke diamond work. Ideal for designers requiring signature cuts, unusual proportions, or one-of-a-kind stones.
A leading producer of IGI-certified lab-grown diamonds using both CVD and HPHT methods. Offers the full range of shapes and sizes with consistent quality and competitive pricing.
Direct access to Russian natural rough with in-house cutting capabilities. Specializes in Type IIa stones and exceptional clarity grades sourced from verified Siberian mines.
We verify active IGI certification status and review grading consistency across a sample of each manufacturer's recent production.
All natural diamond partners must provide Kimberley Process documentation. Lab-grown partners submit production chain documentation.
Our gemologists conduct on-site or third-party quality inspections before any manufacturer is listed on the platform.
Partners are re-audited annually. Any certification lapse or quality complaint triggers immediate review and potential suspension.
Tell us your specifications and we'll connect you with the right manufacturing partner — or source across multiple partners for a complete order.