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.
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.
Start collecting with confidence
Catalog your collection, check specimens before you buy, and know which sellers other collectors trust.
No credit card required
Install Sage & Stone
Add to your home screen for a faster, app-like experience.
