Diamond certification is the written proof of a diamond’s attributes

agi Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe

Learn more about synthetic diamonds and where they come from.

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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.

agi has been at forefront of diamond grading and certification since it’s inception almost 50 years ago, helping our customers achieve their goals. With over 13,000 clients across three continents, agi is the name trusted by the diamond industry for over fifty years

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