RockSure: Rock Identifier

Found a stone on a hike, at the beach or in the garden? Take a photo. RockSure identifies rocks, crystals, gemstones, minerals and fossils, tells you how sure it is, and shows you how to check it yourself.

AN ANSWER YOU CAN TRUST
A rock scanner can't be right every time. A photo shows color and shape, not hardness or weight. So RockSure doesn't pretend:
• Every answer comes with a clear confidence meter
• When it isn't sure, it says so and suggests a better photo
• It shows the other possible matches, not just one name
• Simple home tests (scratch, streak, magnet, vinegar) help you tell them apart

SAME STONE, SAME NAME
RockSure names stones from a fixed catalog of about 180 rocks, minerals, crystals and fossils, so you don't get a different made-up name every time. Add up to 3 photos from different angles for a surer answer.

REALLY FREE TO START
• 3 identifications every day, free, for as long as you like
• No account, no login, no email
• No ads
Pro unlocks unlimited identifications (fair use applies), all possible matches, home tests and a rough value guide. You see the price in Google Play before you pay, and you can cancel anytime in Google Play.

STONE VALUE, HONESTLY
RockSure gives a rough guide to the typical value of a stone like yours. Real value depends on quality, size and the buyer, and no photo app can prove that a gem is real. For anything valuable, ask a gemologist.

WHAT IT IDENTIFIES
• Rocks: granite, basalt, obsidian, sandstone, slate, marble and more
• Minerals: quartz, calcite, pyrite, fluorite, malachite, mica
• Crystals and gemstones: amethyst, agate, jasper, garnet, tourmaline, opal
• Fossils: ammonites, trilobites, shark teeth, petrified wood
• Look-alikes: glass, concrete, brick and plastic are recognized as not natural stone

LEARN ABOUT YOUR FIND
What it's made of, how hard it is, and where it is usually found.

YOUR COLLECTION
Every identified stone is saved on your phone with the date you scanned it. Delete any find whenever you like.

GREAT FOR
Rockhounding, fossil hunting, beachcombing, crystal and mineral collecting, and anyone learning geology.

PRIVACY
Your photos are used only to identify the stone and are not stored. Your collection stays on your phone.