Rock Identifier
An app that names a rock, mineral or crystal from a photo.
What Rock Identifier does
Rock Identifier (Stone ID) is a very popular rock and crystal ID app, from the makers of CoinSnap. Snap a stone and it suggests what it is, with a reference page for each result. It's on iPhone, iPad and Android, and unlimited use needs a Premium plan after a 7-day trial.
Take a photo of a rock, crystal or gemstone and Rock Identifier suggests a match from more than 6,000 types. Each result has a reference page with the chemical formula, hardness, typical colors and where it's found, which is great for kids on a beach walk or anyone sorting a shoebox of finds.
Extras include guides for spotting fake gemstones, birthstone and crystal meaning content, a metal detector mode that uses your phone's magnetic sensor, email questions to a rock expert, and a collection with a wishlist.
Two things to know. First, no photo app can be sure about a rock, because a picture can't show hardness, streak or how it reacts to acid. Use the answer as a strong hint and confirm with a simple test if it matters. Second, the paywall is a common complaint in recent reviews, so cancel the trial in your settings if you don't plan to keep it.
Alternatives to Rock Identifier
Who it's for
Skip it if: Anyone who wants a free, unlimited identifier. Confirming a valuable gemstone.
Pricing
7-day free trialRock Identifier is free to download. Premium gives you unlimited IDs and removes ads, with a 7-day free trial on the yearly plan. The App Store lists unlabeled prices from $3.99 to $69.99, and a 2026 review puts Premium at $39.99 or $69.99.
Prices can vary by country. Checked 19 Oct 2026.
What people like
- Fast, easy and very popular
- Rich reference page for every result
- Works on iPhone, iPad and Android
Watch out for
- Unlimited use needs Premium after the trial
- Paywall and charges are common review complaints
- Store prices are listed without plan names
- Photo IDs can be wrong for plain or unusual rocks
Want a rock journal that fits your walks? Build your own.
Describe your app idea and Bilt builds it. Free to start, on your phone in minutes.
Try this idea: “an app where I log rocks I find on walks with a photo, where I found it and my best guess, and mark which ones I've confirmed”
Questions people ask
Is Rock Identifier free?
You can download it free, but unlimited identification needs Premium, which starts with a 7-day free trial.
How accurate is it?
It's a good first guess, but no photo can show hardness or streak. Confirm important finds with a simple test or ask a local rock club.
Can it tell me if a gemstone is real?
It has guides on spotting fakes, but a photo can't prove a stone is real. For anything valuable, ask a gemologist.
Is it on Android?
Yes. It's on Google Play and the App Store.