Welcome to agi

agi has been at forefront of diamond grading and certification since its inception almost 50 years ago, helping our customers achieve their goals.

agi offers a range of certification services, including a customised diamond sealing service and valuation reports, all of which are graded according to industry standards

agi is the first international diamond laboratory to open a dedicated diamond grading and valuation laboratory in the UK to provide its high class service and superior turnaround times to the UK Jewellery market, established in the UK in 2000.