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What is this rock?

Upload a photo of a rock, mineral or fossil. You get a short, honest assessment: one to three candidates, confidence in words, and which real-world tests would settle it. No invented certainty, no invented value.

AI assessment (Claude) — can be wrong. Hardness, streak and acid tests beat any photo.

And where do you find something like it?

The orecast map shows documented occurrences from official geological surveys across ten countries — including what is on record near you.

Open the map

In the app you get your own quota, plus the map offline in your pocket. App Store · Google Play