Know what you're buying.
Before you buy it.
Sage & Stone is a home for mineral specimen collectors — track your collection, check a piece before you buy, see which sellers other collectors actually trust, and soon, buy and sell directly through the marketplace.
Free while in early access · no credit card required
Specimen collecting, reimagined.
Live-selling made specimens easier to find and harder to verify. There's still no standard way to know if a piece is priced fairly, or if a seller can be trusted — until now.
Five tools. One trust layer.
Everything you need to buy, track, and sell specimens with confidence — without ever needing to leave the platform to double-check someone else's word.
Collection Tracking
Catalog every specimen you own — species, locality, formation, dimensions, provenance — and watch your collection's estimated value update automatically as you add pieces.
Visual Check
Upload a photo of any specimen — live-stream screenshot, gem show find, or listing photo — and get a likely identification, red flags to watch for, and how it compares to what similar pieces have sold for.
Price Intelligence
See typical price ranges by species, locality, and size — built from real purchases logged by collectors, not guesswork or a single seller's asking price.
Credibility Score
Sellers earn a score based on whether buyers say the material actually matched the description — not general satisfaction, not stars for good packaging.
Simple to join, built to grow with your collection
A marketplace built on trust you can already see
Once the credibility layer has real data behind it, buy and sell directly on Sage & Stone — tracked shipping, delayed payout, and human-reviewed disputes, with verified sellers from day one.
Join the marketplace waitlist
Early access — be first to catalog with confidence
Join the waitlist and we'll let you know the moment Sage & Stone opens for early access.
No spam. Just one note when we're ready for you.
Install Sage & Stone
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