Rock Identifier: Crystal Scan

Foster Apps LLC

In-app purchases

About this app

Rock Identifier: Crystal Scan is a rock identifier, stone identifier and crystal identifier that tells you how sure it is. Take a photo of a rock, mineral or crystal and it names the closest match from a reviewed reference library of common rocks, minerals, crystals and man-made look-alikes such as slag, concrete, brick and sea glass.

Every result shows a confidence level and the closest alternatives, so you know when an answer is solid and when it needs checking. Results are AI estimates: confirm anything important with the home tests or an expert.

— SETTLE IT WITH THREE HOME TESTS —
Streak: rub the stone on the unglazed back of a tile and note the powder colour.
Scratch: try a fingernail, a steel nail and a glass bottle.
Magnet: hold a fridge magnet against it.
Record what you saw and the app checks each candidate against its reference facts, showing which ones fit and which are ruled out. It is the quickest way to tell pyrite from gold, quartz from calcite, or magnetite from hematite.

— REFERENCE FACTS, NOT GUESSES —
Hardness on the Mohs scale, streak, luster and magnetism come from the built-in library, with cautions where they matter, such as lead in galena or fibres in some serpentine.

— MORE PHOTOS, MORE CONSISTENT ANSWERS —
Photograph a stone from up to three sides. When the photos agree, confidence goes up; when they disagree, every candidate stays on screen for the tests to settle.

— YOUR COLLECTION —
Save each find with its photos, the result, where you found it, your notes and the tests you ran. Your collection stays on your phone. Rock hounds can export the whole collection as a spreadsheet.

— FREE AND PRO —
One identification a day is free, with the full result, the home tests and an unlimited collection. Pro is an optional monthly or yearly subscription, or a one-time lifetime purchase, that unlocks unlimited identifications, up to three photos per rock and collection export. No trial and no account needed. Cancel anytime in Google Play.

Results are for information and education only. They are not a valuation and not safety advice.

What’s new

First release.