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agi Services Overview


Diamond Grading Report
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Our flagship product, the agi Diamond Grading Report is an A4 sized certificate with full details of the diamond gradings, measurements and inclusion plotting on a facet diagram. Using Comparison charts for Colour, Proportions, Finish and The New Cut Grade to enable you to see at a glance the grading of your diamond.


Diamond Identification Report
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A handy credit card sized durable card. Whilst clear and easy to understand, it provides concise details about your diamond.

  • Colour picture of the item or facet diagram (piece or loose stones)
  • 4C's grading in a clear, easy to understand format

agi was the first to introduce the credit card certificate to the UK, now an industry norm.


Diamond Valuation Report
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A useful and easy to understand certificate, giving clear and concise information about the item of jewellery with optional retail or valuation.

  • Full description of item
  • Optional valuation price
  • Helps prevent insurance fraud