GeoCrystal: Minerals & Rocks

Explore the Earth sciences with GeoCrystal, the ultimate field guide and pocket laboratory for rockhounds, geologists, mineral collectors, and outdoor explorers.

AI-POWERED IDENTIFICATION
Found an unknown rock or crystal? Simply snap a photo: advanced AI visual recognition identifies mineral and rock specimens in seconds, providing scientific names, confidence details, and direct links to full encyclopedic data sheets.

COMPREHENSIVE OFFLINE CATALOG
Access an extensive database of minerals, gemstones, and geological sites across the globe:
• Physical properties: Mohs hardness scale, luster, cleavage, fracture, streak color, and crystal habit.
• Chemical data: chemical formula, Strunz classification, and element breakdown.
• Crystal systems, formation environments, and rare mineral varieties.

DIGITAL FIELD NOTEBOOK & COLLECTION
• Catalog your collection with high-resolution photos, date, GPS coordinates, and fieldwork notes.
• Add custom specimen numbering and organize your personal geology cabinet.
• Submit your finest specimens to the Community Showcase to share your discoveries worldwide.

PROFESSIONAL FIELD TOOLS
Designed for fieldwork, hiking, and geological surveys:
• Geological Compass & Clinometer: measure strike, dip angle, and dip direction with real-time attitude symbols and integrated spherical bubble level.
• Geological Timescale: interactive chronostratigraphic chart based on international ICS standards, from the Hadean to the Holocene.
• Mohs Hardness Reference: practical field test guide using diagnostic minerals and common scratch tools.

EXPLORE & DISCOVER
• Explore renowned mineral localities and mining districts worldwide with map directions.
• Discover traditional and modern birthstones for every month with their unique traits.

Download GeoCrystal today and turn your device into a powerful field geology companion!

Recent changes:
• New "Report" button under the photo identification results: let us know if an answer is wrong or inappropriate.
• New "Support the developer" option in Settings: an optional one-time contribution that adds a Supporter label to your profile. It unlocks no features.
• Small improvements.