RockLens: Rock Identifier

Photograph a rock, mineral or crystal to explore its likely identity, visible traits and formation. RockLens brings details such as color, luster and reference hardness together, helping you learn the story behind a specimen you found.

Explore the specimen
Take a clear photo or choose one from your library. Check the likely match and explore color, luster, crystal-system and formation details.

Learn the distinguishing traits
Explore hardness, streak, fracture and luster. Use the guides to learn how these traits help distinguish similar specimens.

Look beyond the surface
Explore the background information and read articles about imitation or treatment clues. Keep the details you want to research with your specimen record. From an unlocked result, open a guide to common imitations and treatments (learning clues, not a verdict on your specimen).

Keep an observation journal
Save an unlocked result, add notes and organize items in folders. Revisit your saved details and identification history as you explore. Add specimens you want to collect to a separate wishlist from an unlocked result, and filter saved specimens by rock type or mineral group.

Learn with 12 guides
Read 12 topic guides in step-by-step pages, alongside other in-app articles. No subscription is needed to read the guides.

Ask your next question
Open the assistant from the result page to ask follow-up questions and keep learning. Usage limits are shown in the app.

Read the safety note
This is an educational identification and reference tool, not a professional or safety authority. Photo matches can be wrong, and details may be incomplete; missing risk information does not mean safe. Do not use the app to decide whether anything can be eaten or safely handled. Verify important identifications independently and follow local rules. A photo is not a laboratory test and cannot certify a specimen as natural, untreated or genuine. Hardness information describes reference properties, not a measurement of your specimen; mineral information and cultural stories are not health or therapeutic advice.

Understand your privacy
We use PostHog for limited product analytics and AppsFlyer to measure installations and ads for our apps. Eligible event data may be shared with Meta for advertising measurement and optimization under applicable privacy controls. Photos go to our recognition service and Google's AI models to identify them. They are not used for advertising. See our Privacy Policy for details.

Explore access and purchases
Explore with an initial allowance of complete photo-identification results. Once it is used, parts of new results are locked and a paid upgrade is offered. Availability and limits are shown in the app.
Paid access applies to this app. Check the purchase screen for available options, prices, trial eligibility and usage limits. A trial, if offered, depends on eligibility. Subscriptions renew automatically unless canceled; manage or cancel them in your App Store account settings.

Read the terms
Terms of Use: https://rocklens.app/terms
Privacy Policy: https://rocklens.app/privacy
Both are also available inside the app.