Mineral, Gem, Rock Identifier

Identify rocks with AI. See what others are discovering around the world.

Tero is a rock identifier app for curious minds - whether you're on a hike, at the beach, or just found something interesting in your backyard.

SCAN & IDENTIFY WITH AI Take a photo of any rock, mineral, gemstone, or fossil. Tero's on-device AI identifies it instantly - no internet needed. Get the top candidates with confidence levels, formation type, hardness, and more.

NARROW IT DOWN WITH A QUIZ Not sure which candidate is right? Tero walks you through simple hands-on tests: scratch it with a coin, hold it to a flashlight, check if a magnet sticks. Each answer dynamically re-ranks the possibilities until you find your best match.

EXPLORE GEOLOGY ON THE MAP Open the app and explore. Tap anywhere on the map to see what geological formations exist at that location - formation name, age, and what rocks you might find there. Browse rocks found in your city before you even step outside.

COMMUNITY DISCOVERIES See what other rock enthusiasts are finding near you on the map. Share your own discoveries and contribute to a growing global map of finds. Tap any discovery pin to see the full identification.

BUILD YOUR COLLECTION Save identified rocks to a personal collection. Track what you've found, where you found it, and build your own digital field notebook.

PRO - DEEPER ANALYSIS Upgrade to Pro for enhanced AI analysis powered by Google Gemini: • Detailed reasoning - why we think it's this rock, and why we're not 100% sure • Learn to Spot - what it's commonly confused with and how to tell them apart • Collector's Notes - rarity, what makes your specimen special, estimated value • Verification tips - simple tests to confirm the identification

TERO PRO SUBSCRIPTIONS • Tero Pro Weekly: $3.99 per week • Tero Pro Annual: $34.99 per year

Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase.

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