What kind of rock is this?? Found laying on the surface of gravel.
closed as off-topic by Jan Doggen, Fred, daniel.neumann, arkaia, Trevor J. Smith Jan 30 at 16:32
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Please review our rock identification guidelines to provide the missing information so that your question is both answerable and useful to new users." – Jan Doggen, Fred, daniel.neumann, arkaia, Trevor J. Smith
Based just on the pictures, it is quartz. If that is the case, a knife won't scratch it. Please see our guide for asking “Identify this rock” questions.