Photograph the specimen
Add an overall view and, when useful, a close detail or a second face. Optional find context stays attached to the record.
A field cabinet in your pocket
Identify it.
Keep the story.
Photograph a rock, mineral, gem or fossil. Rock Hound suggests a defensible technical name, saves it privately, and lets you choose whether approved finds join your public collection.
Join the private beta
See how it works
Explore public finds
Free to start · iPhone and Android store release in progress
Colour of the day ·
Colour of the day ·
From field to cabinet
One quick flow. A useful record.
The app starts with the camera, keeps the geology clear, and avoids pretending a photograph can prove more than it can.
Narrow the identification
Rock Hound reports common and technical names with visible evidence and uncertainty. If needed, it asks no more than three simple, safe questions.
Save it automatically
The photos and identification become a collection entry immediately, ready for tags, a collection number, notes, favourites and later correction.
Built for looking closely
Your cabinet—private unless you share it.
Browse and inspect privately, or publish an approved collection page and follow recent finds from collectors you choose.
Fast visual browsing
Filter favourites, rocks, minerals, gems, fossils and work in progress. Search names, tags and collection numbers.
Swipe, zoom and compare
Move through cover photos full screen with 1–5× zoom. Tonal, detail and colour views are clearly labelled as viewing aids—not mineral tests.
Geology-specific detail
Keep classification, lustre, texture, composition, crystal system, fossil context and your own private field notes together.
Honest when the image is not enough
Results include alternatives and conflicting evidence. Important or hazardous determinations should still be checked with an experienced specialist.
Follow recent field finds
The feed prioritises public updates from collectors you follow and adds a small selection of recent public specimens to discover.
Take it into the field
Your next find belongs in Rock Hound.
The first public store release is being prepared now. Visit the download page for availability.
Private by default
A collection app should respect the collector.
New collections are private. Public sharing is optional, reversible, and uses a separate record that excludes private collection details.
Optional location
Exact coordinates stay in the private record. Only a coarse area may assist identification, and location can be omitted.
Private notes stay private
Personal notes are stored with the specimen but are not sent to the identification model.
Public means a strict subset
Public pages can show approved images and identification fields, but never email, location, notes, collection number or capture date.
You control deletion
Delete one specimen or all of your Rock Hound records and photos from Settings.
AI-assisted, not laboratory-confirmedPhoto identification can be wrong. Do not use the app to decide whether a specimen is safe to touch, cut, grind, taste or heat.