| Company | County |
| AGS | USA |
| ALROSA | Russia |
| Assay office of Russian Federation | Russia |
| GIA | USA |
| Good Old Gold | USA |
| Padma Gems | India |
| Pansuriya Impex | India |
| Parishi Diamond | India |
| R.T. Star Solitaires | India |
| Ratnadeep Impex | India |
| Ratnaraj | India |
| Rijay Diamond Exports Pvt. Ltd. | India |
| Rosy Blue (India) Pvt. Ltd. | India |
| S. VinodKumar Diamond Pvt. Ltd. | India |
| S.D. Diamond Limited Liability Company (Group of K.G.K Enterprise) | Moscow, Russia |
| Sanghavi Exports International Pvt. Ltd. | India |
| Sanghvi & Sons | India |
| Savani Brothers | India |
| Shairu Gems | India |
| Shital Diam | India |
| Shree Ramkrishna Export | India |
| Shrenuj & Company Limited | India |
| Supergems (India) Pvt. Ltd. | India |
| Venus Jewel | India |
| Vimal Export | India |
| Viren Gems | India |
| Vishinda Diamonds | India |
| World Gemological Institute | Israel |
| WTOCD | Belgium |
| Company | County |
| Afriasia DMCC | Dubai, U.A.E. |
| Akarsh Exports | India |
| ALROSA | Russia |
| Ankit Gems | India |
| Atmanand Gems | India |
| Aurora Diamond Industry | Dubai, U.A.E. |
| B. Mahesh | India |
| Bhajan Jewels | India |
| Bhansali & Co | India |
| Bhargovi | India |
| Bhavani Gems | India |
| Blue Diamonds Limited | Sri Lanka |
| Blue Star | India |
| Brown Diamonds Mfg. Pvt. Ltd (Group of Sheetal Manufacturing Co.) | India |
| C. Dinesh & Co. Pvt. Ltd. | India |
| C. Mahendra Exports Pvt. Ltd. (100% EOU) | India |
| Chow Tai Fook Jewellery Co. Ltd. | Hong Kong |
| Conghua East Unicorn Diamonds Limited (Group of Eurostar, China) | China |
| D.A. Jhaveri (Alpa Diamond) | India |
| DD Mfg. | Belgium |
| Dharmanandan Diamond Pvt. Ltd. | India |
| Diacenter | India |
| DiamCad Botswana | Botswana |
| DiamCad NV | Belgium |
| Diamond Design | Russia |
| Diarough NV | Belgium |
| Diarough South Africa Pty. Ltd. | South Africa |
| Facets Polishing Works Pvt. Ltd. | India |
| Godhani Gems | India |
| Godhani Impex | India |
| H. Riddhesh & Co. | India |
| HariKrishna Exports | India |
| Hope of Africa BVBA | Belgium |
| Ideal Cut Ltd., (Group of Sanghavi Exports International Pvt. Ltd.) | Moscow, Russia |
| Indian Diamond Institute | India |
| J.B. & Brothers (100% EOU) | India |
| Jeely | India |
| K. P. Sanghvi & Sons | India |
| K.G.K Star Rough Pty. Ltd. | South Africa |
| K.G.K. Enterprise | India |
| Kalsaria Diamonds Pvt. Ltd. | India |
| Karp Impex Ltd. | India |
| Laxmi Diamond Pvt. Ltd. | India |
| Lemon TechnoMist Pvt. Ltd | India, China, South Africa, Botswana |
| Matrix Diamond Technology NV | Belgium |
| Mohit Diamonds Pvt. Ltd. | India |
| Monarch Gems | India |
| Munjani Brothers | India |
| N. Satishkumar & Co. | India |
| Pansuriya Impex | India |
| Pranami Gems | India |
| Prime Diamonds Pvt. Ltd. | India |
| R.T. Star Solitaires | India |
| Radhika Diamonds Mfg. Pvt. Ltd (Group of Sheetal Manufacturing Co.) | India |
| Rijay Diamond Exports Pvt. Ltd. | India |
| Rosy Blue Diamond Johhanesburg (Pty) Ltd. | South Africa |
| Rosy Blue N.V | Belgium |
| Rupam Impex | India |
| S.D. Diamond Limited Liability Company (Group of K.G.K Enterprise) | Moscow, Russia |
| Safdico Botswana (Pty) Ltd. | Botswana |
| Safdico RSA (Pty) Ltd. | South Africa |
| Sahil Gems | India |
| Sanghavi Exports International Pvt. Ltd. | India |
| Sanghvi & Sons | India |
| Savani Brothers | India |
| Shairu Gems | India |
| Shital Diam | India |
| Shree Ramkrishna Export | India |
| Smolensk-Tache | Smolensk, Russia |
| Supergems (India) Pvt. Ltd. | India |
| Twinkle Diamonds | India |
| Venus Jewel | India |
| Vimal Export | India |
| Viren Gems | India |
| Xenopz BVBA | Belgium |
| Company | County |
| Akarsh Exports | India |
| Ankit Gems | India |
| Bhajan Jewels | India |
| Bhavani Gems | India |
| Blue Diamonds Limited | Sri Lanka |
| Blue Star | India |
| Brown Diamonds Mfg. Pvt. Ltd (Group of Sheetal Manufacturing Co.) | India |
| Conghua East Unicorn Diamonds Limited (Group of Eurostar, China) | China |
| Chow Tai Fook Jewellery Co. Ltd. | Hong Kong |
| DD Mfg. | Belgium |
| Dharmanandan Diamond Pvt. Ltd. | India |
| Diacenter | India |
| DiamCad NV | Belgium |
| Diamond Design | Russia |
| Diarough NV | Belgium |
| Diarough South Africa Pty. Ltd. | South Africa |
| Facets Polishing Works Pvt. Ltd. | India |
| Godhani Gems | India |
| HariKrishna Exports | India |
| Hope of Africa BVBA | Belgium |
| J.B. & Brothers (100% EOU) | India |
| K. P. Sanghvi & Sons | India |
| Lemon TechnoMist Pvt. Ltd | India, China, South Africa, Botswana |
| Matrix Diamond Technology NV | Belgium |
| S.D. Diamond Limited Liability Company (Group of K.G.K Enterprise) | Moscow, Russia |
| Kalsaria Diamonds Pvt. Ltd. | India |
| Karp Impex Ltd. | India |
| K.G.K Star Rough Pty. Ltd. | South Africa |
| Monarch Gems | India |
| N. Satishkumar & Co. | India |
| Pranami Gems | India |
| Rijay Diamond Exports Pvt. Ltd. | India |
| Rosy Blue N.V | Belgium |
| Rupam Impex | India |
| Safdico RSA (Pty) Ltd. | South Africa |
| Safdico Botswana (Pty) Ltd. | Botswana |
| Sanghvi & Sons | India |
| Sanghavi Exports International Pvt. Ltd. | India |
| Shairu Gems | India |
| Shital Diam | India |
| Shree Ramkrishna Export | India |
| Twinkle Diamonds | India |
| Venus Jewel | India |
| Vimal Export | India |
