Gemstones & diamonds
Gem lab reports: what each section means
What each section of a diamond grading report and a coloured stone report means, what a report does not tell you, and how to check it matches the stone.
5 Oct 2026
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Guides and interactive explainers on gemstones, diamonds, metals and making jewellery, written for people in the trade and checked against named sources.
Tagged “diamonds” · Clear