Access 130+ years of jewelry auction results, private sales, and dealer transactions. Analyze signed jewelry, estate pieces, and rare gems with comprehensive pricing data from Christie's, Sotheby's, specialty auctions and marketplaces.
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— Portfolio Manager, Gemstone Investment Fund, LondonThe full platform
From a thirty-second valuation to a full API feed, every ALT/FNDATA product runs on the same institutional pricing data across the great houses and famous stones.
Market Reports
The Jewels & Gems quarterly: realized returns, top-of-market pricing and auction-house league tables.
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Price Check
What is a Kashmir sapphire or a signed Cartier piece worth today? Instant valuation from real auction comparables.
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Claude MCP
Ask Claude “median Kashmir sapphire by carat” and query the full dataset from your own AI tools.
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Enterprise Datasets
Transaction-level jewels & gems data via API, BigQuery or bulk export, with custom ranges and dedicated onboarding.
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The record book
A live slice of the jewels and gems dataset: realized results for the great coloured diamonds and signed pieces. Every figure is a real transaction, not an estimate.
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