Sandstone (with Iron Staining)
Clastic Sedimentary Rock (SiO2 with Fe2O3/FeO oxides)
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.
Jasper with Iron Staining
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Banded Iron Formation (BIF)
Banded Iron Formation (predominantly Hematite, Magnetite, and Chert)
sedimentary
Chert / Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Pegmatite
Granitic Pegmatite
igneous
Fuchsite (Chrome Mica)
Cr-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Actinolite
Ca2(Mg,Fe)5Si8O22(OH)2
mineral
Biotite Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Granite (High-silica plutonic rock)
igneous
Granitic Pegmatite
Pegmatite containing Quartz, Feldspar, and Muscovite mica
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Granite Water-Worn Pebble
Felsic intrusive igneous rock (Granite)
igneous
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.