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.

No download? Try the free online identifier

4.7on the App Store

Rock Identifier app showing an identified specimen

Live from the field

Recent identifications

A rolling collection of rocks, minerals, and gems just identified by the Rock Identifier community.

Browse all

Drill-core rock, likely foliated metamorphic rock

Indeterminate from the photograph; possibly slate, phyllite, or schist

metamorphic

Likely mica-rich schist

Mica schist, probably muscovite–biotite schist with quartz and feldspar

metamorphic

Tumbled mahogany obsidian

Obsidian, volcanic glass (composition typically rhyolitic)

igneous

Polished reddish-brown stone bead, possibly jasper

Likely iron-rich microcrystalline quartz (jasper; SiO₂), but the image is not sufficient for a confident identification

gemstone

Engraved purple stone cabochon, possibly amethyst

Unconfirmed; if amethyst, quartz (SiO₂)

gemstone

Tumbled tiger’s eye

Quartz (SiO₂) with crocidolite-derived fibrous inclusions

gemstone

Weathered granite

Granite, composed mainly of quartz, feldspar, and dark mica or amphibole

igneous

Possible tumbled dark-green stone

Indeterminate from the blurry image; possibly serpentine or another green ornamental stone

mineral

Weathered granite

Granite, chiefly quartz, potassium feldspar, plagioclase, and biotite or hornblende

igneous

Polished pink opal (likely common opal)

Opal, hydrated amorphous silica (SiO₂·nH₂O)

gemstone

Weathered granite

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica

igneous

Likely tumbled orange carnelian

Carnelian, orange chalcedony (microcrystalline quartz, SiO₂)

gemstone

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.