Rock Identifier Quiz
Narrow down a rock from colour, texture, and hardness with a starter guide.
Quick answer: enter your details below and click Identify the Rock — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Enter your values in the fields provided.
- Click Identify the Rock.
- Read the result and adjust an input if you want a different outcome.
About this tool
This is a starter guide built from a small built-in list, not a geology textbook. Pick colour, texture, and whether a steel nail scratches the rock, and the tool suggests likely rock types to compare against a proper reference.
Frequently asked questions
What do I enter to get a result?
Fill in every field with your own numbers or choices, then run the tool. Empty number fields count as zero, so check them before you trust the output.
Can I reuse this result elsewhere?
Yes. The result is calculated in your browser from the values you entered, so you can copy the numbers into your own notes or plan.