Certification
Gübelin Gem Lab: Heritage and Modern Verification
Gübelin is one of the oldest and most respected gemological laboratories, known for rigorous origin determination and its Gübelin Gem Report.
A long-established authority
Switzerland's Gübelin Gem Lab has decades of experience in origin determination for coloured stones and is widely referenced in the trade for high-value ruby, sapphire and emerald transactions.
The Gemtelligence and Gübelin Report
Gübelin issues detailed reports covering identification, treatment indications and, where possible, geographic origin, often supported by its own reference databases built from decades of fieldwork.
Checking authenticity
Gübelin provides tools to verify report authenticity directly through the lab, which buyers should use for significant purchases rather than relying solely on a printed document.
Buyer checklist
- ✓ Verify the report number directly with Gübelin for high-value purchases
- ✓ Read origin statements as expert opinion based on current science, not absolute certainty
- ✓ Ask whether treatment indications are described as none, minor or significant
Verification tools & references
Every Riakoob piece arrives certified, insured and covered by our 12-month value promise.
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