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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.

With over 13,000 clients across three continents, agi
is the name trusted by the diamond industry for over fifty years

Part of agi's 'Certification - Pure and Simple' advertising campaign