What might this rock be?

Request a photo-based starting point: most likely, a few possible alternatives, and the clues that help tell them apart.

Your specimen

Embedded photo metadata is removed before analysis; visible surroundings and anything you type can still reveal location. Avoid faces, addresses and private details. Nothing is added to the public scrapbook.

Email sign-in required for analysis · Beta limit: 5 requests per person per day; a shared daily cap also applies.

HOW RESULTS WILL READ

Most likely… But it could also be…

When analysis is available, a result will list a leading candidate, up to three plausible alternatives, visible supporting clues, and safe ways to narrow the possibilities. No invented certainty percentages.

For a useful photo

  • Use daylight and a neutral background.
  • Keep the specimen in focus and include a ruler for scale.
  • Show more than one angle when requesting a follow-up.
  • Mention visible grain, layers, glassy surfaces or crystal shapes.

A photograph cannot authenticate a diamond, ruby or meteorite, establish value, or certify a specimen is safe. Never taste unknown rocks, breathe dust, cut, grind or chemically test them. Ask a qualified geologist or gemologist when it matters.

Browse the rock & mineral atlas →