We built the tool we wished existed
GemmoPrice was born out of a simple frustration: the market for important colored gemstones and fancy diamonds is one of the most complex in the world of luxury assets — and yet the information needed to navigate it exists. It is published, lot by lot, sale by sale, by the auction houses themselves. We built GemmoPrice to gather that data, structure it, and make it searchable in the ways that professionals actually think. Not by GIA grade alone, but by origin, treatment, brand, provenance, year, auction house, and dozens of other criteria that experienced traders, gemmologists, and appraisers know matter. Auction houses represent the most transparent mechanism for price discovery in the fine gem trade. When a Mozambique ruby or a Kashmir sapphire sells at Christie's or Sotheby's, the estimate, the hammer price, and the full details become a matter of public record. GemmoPrice makes that record searchable, comparable, and useful — for the professionals who need it most. GemmoPrice is a division of GEMCO di Paolo Cerruti, Genova, Italy.
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Auction records
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Rubies
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Sapphires
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Emeralds
14 years of auction intelligence — in one platform
What drives everything we do
Transparency
Auction houses are the most transparent price discovery mechanism in the fine gem trade. We make that transparency accessible and searchable.
Professional rigour
GemmoPrice is built for trained professionals. We do not simplify — we give you the raw evidence and trust you to interpret it.
Data integrity
Every record is sourced directly from the auction houses. We do not curate, adjust, or editorialize the data.
Continuous coverage
The database grows with every major jewellery sale worldwide. Coverage spans from 2011 to the present across 8 leading houses.
Global perspective
Important gemstones trade across continents. Our platform reflects that — 10 languages, 9 currencies, and a truly international dataset.
Practical intelligence
From benchmarking a valuation to choosing the right auction house for a consignment — the platform is built around how professionals actually work.
The people behind GemmoPrice
GemmoPrice was founded by two professionals with deep roots in the gem and jewellery trade. Their combined experience spans decades of international market activity.
Giovanni Guazzotti
Co-founder
Paolo Cerruti
Co-founder — GEMCO