Chert (Flint)
Silicon Dioxide (SiO2)
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.
Flint
Chert (SiO2)
sedimentary
Sandstone with Trace Fossils
Arenite with Ichnofossils
sedimentary
Fossilized Bored Limestone
Limestone with Ichnofossils (Gastrochaenolites or Entobia)
sedimentary
Vesicular Basalt River Cobble
Vesicular Basalt
igneous
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Fossiliferous Kalkstein (Marl/Sandstone)
Fossiliferous calcarenite/siltstone
sedimentary
Boulder Opal
Hydrated amorphous silica (SiO2·nH2O) in ironstone matrix
mineral
Pumice
Pumice (Vesicular Rhyolite/Andesite)
igneous
Granite
Granitoid (dominated by Quartz and Feldspar)
igneous
Chert (White Variety)
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (with Iron Staining)
Arenite (SiO2 predominantly)
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.
Take Rock Identifier out into the world.
Free to download. The next rock you pick up — name it.