Gold Purity Testing & Assay / Hallmarking Centres in Tamil Nadu (District-wise)
| Name of Centre | District / City | Contact Phone |
|---|---|---|
| Tamilnadu Hallmarking Centre | Chennai | 044-4205-3157 |
| Prince Hallmarking — T Nagar Main Centre | Chennai | 78259-00084, 78259-00085 044-3500-5835 |
| Prince Hallmarking — Elakandappan Street Offsite | Chennai | 78259-00083, 044-4237-1101 |
| Prince Hallmarking — Coimbatore (Raja Street) | Coimbatore | 78259-00086, 78259-00087 0422-3133258 |
| Shantivijay Testing | Chennai (T. Nagar) | 98400-43369 |
| Lotus Assay Private Ltd. | Salem | 98427-96363 |
| Bombay Test House Pvt. Ltd. | Salem | 98677-91105 |
| Star Assaying & Hallmarking Centre Pvt. Ltd. | Chennai (T. Nagar) | 95001-94222 |
| KTC Hallmarkings | Coimbatore | 96777-71916 |
| Classic Assaying & Hallmarking Centre | Coimbatore | 94861-86206 0422-2343388 |
| Marudhar Hallmarks | Chennai (Sowcarpet) | 98423-23271 |
| Sri Mithra Hallmarking Centre | Chennai (T. Nagar) | 84382-39699 |
| M M Hallmarking Centre | Chennai (Sowcarpet) | 98843-43176 |
| Sri Shanmuga Assaying & Hallmarking Centre | Villupuram | 98404-94951 |
| AADINATH Hallmark Centre | Chennai | 76679-74497 |
| V T Hallmarking Centre | Chennai (Sowcarpet) | 96000-36565 |
| Arihant Hallmarking Centre | Chennai (G.P.O.) | 99282-75100 |
| T Nagar Hallmark Centre | Chennai (T. Nagar) | 89394-24596 |
| Dhruv Hallmarking & Assaying Centre | Chennai (T. Nagar) | 96770-06901 |
| Vasraj Assaying & Hallmarkings Centre | Tiruvannamalai | 99944-5522 |
Note: All listed centres are recognised under the BIS Assaying & Hallmarking scheme and provide gold purity testing, hallmarking or assay services. Verify services (non-destructive vs. certified assay) directly with the centre before visiting. Websites and emails for many are available on the BIS portal if needed.