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Gemstones

Gem certificate: how to read a gemological report

What the lines in a report mean: treatment, origin, weight, clarity — and what to check first.

February 5, 20266 min read
Gem certificate: how to read a gemological report

A gem report is the stone's "passport". Key lines and what to check first.

Main lines Identification (Natural vs Synthetic), Treatment (heated, oiled), Weight, Measurements, Colour, Clarity, Origin.

Check first Natural or synthetic, treatment, and whether weight/measurements match the stone shown.

Frequently asked questions

What matters most in a gem report?+

Natural vs synthetic and any treatment, then weight, colour, clarity, and origin for expensive stones.

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