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

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

Weathered basalt

Basalt; fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene with possible olivine

igneous

Polished jasper pebble

Microcrystalline quartz (SiO₂), commonly with iron-oxide inclusions

metamorphic

Biotite granite (weathered granitic rock)

Granite, composed mainly of quartz (SiO₂), feldspar, and biotite mica

igneous

Black obsidian

Volcanic glass, predominantly rhyolitic silica glass (approximately 70–80% SiO₂)

igneous

Likely weathered granite or granitic pegmatite fragment

Granite; chiefly quartz (SiO₂), feldspar, and mica/amphibole

igneous

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony; SiO₂, with iron-oxide inclusions

metamorphic

Weathered basaltic rock

Likely vesicular basalt or basaltic andesite; fine-grained plagioclase–pyroxene rock

igneous

Likely mica-rich metamorphic rock (schist)

Muscovite–biotite schist; composition commonly quartz + feldspar + mica

metamorphic

Quartz-bearing greenstone (probable epidote–quartz rock)

Epidote–quartz schist/greenstone; chiefly quartz (SiO₂) and epidote [Ca₂(Al,Fe)₃(SiO₄)₃(OH)], with possible chlorite and feldspar

metamorphic

Dark mafic metamorphic rock, likely amphibolite

Amphibolite; chiefly hornblende amphibole and plagioclase feldspar

metamorphic

Milky quartz

Quartz (silicon dioxide, SiO₂)

mineral

Tumbled quartz (likely clear/milky quartz)

Quartz, silicon dioxide (SiO₂)

mineral

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.