What's That Rock?📸 Rock, gem & crystal identifier for iPhone
Found a cool rock?
Find out what it is!
Snap a photo and get the top matches with an honest confidence score. Then try simple tests at home to confirm it, and keep your finds in a collection you can search, map and share.
Coming soon to the App StoreHow it works
Free to try. Made for curious hikers, collectors, kids and parents.
- 🪨 Rocks
- 💠 Minerals
- 💎 Gemstones
- 🔮 Crystals
- 🦴 Fossils
- ☄️ Meteorites
See it in action
How it works
Snap
Take a photo of any rock, gem or crystal, or pick one from your library. Add a close-up for a sharper answer.
Match
Get up to three likely matches, each with how sure the app is. No fake certainty.
Confirm & collect
Try the simple, safe tests that tell look-alikes apart, then save your find with notes and where you found it.
What you get
- Honest matches. Up to three likely answers per photo, with a confidence you can trust. Add up to two more photos of the same stone to sharpen it.
- Tests you can do at home. Simple, safe checks to confirm a result.
- Offline library. 100+ rocks, minerals and gemstones to browse any time, plus a Learn section.
- Your collection. Photos, notes, places, favorites and a wishlist. Search it, map it, export it as a PDF.
- Widgets. Stone of the day, your collection, and a one-tap scan.
- Private by design. Your collection stays on your device. No ads, no tracking. Read the privacy policy.
Coming soon to the App Store
A photo can't prove what a stone is, so treat results as a good starting point and ask an expert or a gem lab before you buy, sell or rely on one.