Pick up a rock on a trail and wonder what it is. RockLens gives you the field-guide answer — Mohs hardness, crystal system, formation type, and a confidence-honest ID — so you know exactly what you're holding, right where you found it.
WHY ROCKHOUNDS AND CRYSTAL FANS USE ROCKLENS
Identify any rock, mineral, or crystal in seconds. RockLens names the likely match with a confidence indicator, then opens a profile: common and mineral names, group, color and luster, Mohs hardness, crystal system, and how the stone formed (igneous, sedimentary, metamorphic, or hydrothermal). From a roadside pebble to an amethyst geode, you know what you found.
Read it like a geologist. Each profile breaks down the diagnostic traits geologists use — hardness, streak, cleavage and fracture, crystal habit, and luster — so you tell quartz from calcite, or granite from gneiss.
Tell natural from imitation. Many tumbled "crystals" sold today are dyed, reconstituted, or lab-grown glass. RockLens explains the visual clues that separate a natural mineral from an imitation — bubbles, dye pooled in cracks, suspiciously perfect color — as a learning tool. When confidence is low, it says so.
Discover the lore behind the stone. For collectors who love the stories, every profile can surface birthstone associations and the cultural folklore of a stone — the human side of geology, as background, not medical advice.
Build a mineral cabinet that's all yours. Save every specimen into a personal collection on your device. Track the minerals, groups, and crystal systems you've found, watch your cabinet grow, and earn badges as you complete families and find rarer ones.
Learn as you go. Free in-app guides any rock lover can read: how confidence works, how to run a simple hardness or streak test at home, how to tell look-alikes apart, and how to clean and store specimens.
HOW IT WORKS
1. Capture or pick a photo — a clean, well-lit specimen on a plain backdrop.
2. RockLens identifies the likely match with a confidence indicator; confirm or adjust by hand.
3. Open the profile for traits, hardness, formation, location, and folklore.
4. Save it to your collection and keep exploring.
PRIVACY YOU CAN UNDERSTAND
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 and recognition content are not used for advertising. See our Privacy Policy for details.
A NOTE ON SAFETY AND ACCURACY
RockLens is an educational identification tool, not a professional gemologist, geologist, or laboratory. Identifications, hardness and formation notes, and natural-versus-imitation clues are for general learning and can be wrong on look-alikes. Do not rely on the app for safety-critical or professional decisions, and never taste, lick, inhale dust from, or carelessly handle unknown minerals — some contain heavy metals or asbestos-bearing fibers. Birthstone and folklore content is cultural background only, not health, medical, or therapeutic advice. Always collect responsibly and follow local rules on where collecting is permitted.
SUBSCRIPTION
RockLens Pro is an auto-renewing subscription. Plans are offered weekly and annually (for example, $12.99 per week or $89.99 per year; promotional pricing may be available). Payment is charged to your Apple ID at confirmation of purchase. It renews automatically at the same price and period unless you turn off auto-renew at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Prices may vary by region.
Terms of Use (https://rocklens.app/terms) and Privacy Policy (https://rocklens.app/privacy) are available inside the app.
Start with a single photo — and get to know every stone.
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