Across
- 4. A geometric solid having four sides that are equilateral triangles, or resembling a pyramid.
- 8. A mineral that splits relatively easily and evenly along one or more flat planes.
- 9. A solid in which the atoms are arranged in repeating patterns.
- 10. A naturally occurring, inriganic solid with a specific chemical composition and a definite crystalline structure.
- 11. The way that a mineral reflects light from its surface.
Down
- 1. The color of a mineral when it is broken up and powdered.
- 2. A measure of how easily a mineral can be scratched.
- 3. Minerals that breakwirth rough or jagged edges.
- 5. Describes how a mineral feels to the touch.
- 6. Molten material that forms and accumulates below Earth's surface.
- 7. Minerals that contain silicon and oxygen, and usually one or more elements.