Hoodoo (Limestone / Siltstone Formation)
Claron Formation (Sedimentary Rock - Limestone, Mudstone, Dolomite)
sedimentary
AI-powered field geology
Identify any rockfrom a photo.
Snap a photo of any rock, mineral, gem, or crystal — Rock Identifier names it in seconds and explains how it formed, what it’s made of, and where it came from.
4.7on the App Store
Live from the field
Recent identifications
A rolling collection of rocks, minerals, and gems just identified by the Rock Identifier community.
Quartzite (or Engineered Quartz Stone)
SiO2 (Silicon Dioxide)
metamorphic
Railway Ballast (Crushed Traprock / Basalt with Iron Oxide Staining)
Mafic Volcanic Rock (Basalt / Diabase with Fe2O3.nH2O limonite coatings)
igneous
Granite / Gneiss Ballast Rock
Granite (Quartzo-feldspathic rock)
igneous
Serpentine
Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4
metamorphic
River Pebble (Quartzite / Sandstone)
SiO2 (Quartz-rich sedimentary/metamorphic rock)
sedimentary
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2 composition)
metamorphic
Serpentine (Serpentinite)
Hydrous magnesium iron silicate, (Mg,Fe)3Si2O5(OH)4
metamorphic
Quartzite Pebble (with Quartz Vein)
Meta-quartzite (SiO2-dominated metamorphic rock)
metamorphic
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with Biogenic Fossils
sedimentary
Sandstone (Pebble)
Sandstone (principally SiO2 with iron oxide impurities)
sedimentary
What you get
A pocket geologist, always with you
Identify a rock, then explore everything about it — properties, formation, and your own notes — all in one app.
Photo identification
Point your camera at any rock and get an answer in seconds — no field guide, no guesswork.
Properties & classification
Common name, scientific name, physical properties, and category — the data a geologist would write in a field notebook.
Formation & history
Trace each specimen back through time: how it formed, when, and which geological forces shaped it.
Field notes
Add your own notes to any identification — conditions, observations, or anything you want to remember.
Personal collection
Build a private cabinet of every rock you’ve identified, with your own notes attached.
Community gallery
Browse rocks identified by other rockhounds — and share your own discoveries publicly or keep them private.
How it works
From photo to rock identification in seconds
- Step 01
Take a photo
Capture the specimen in natural light. A clear shot of texture and color is all the AI needs.
- Step 02
AI does the geology
Our model reads mineral, texture, and color signatures to identify what you’re looking at.
- Step 03
Read the report
Get name, classification, formation, uses, and field notes — written like a real field guide.
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Jewelry IdentifierJewelry
Car IdentifierCarsTake Rock Identifier out into the world.
Free to download. The next rock you pick up — name it.