Across
- 1. minerals that contain silicon and oxygen, and usually one or more additional elements
- 3. a mineral that contains a valuable substance that can be mined at a profit
- 7. when a mineral breaks with rough or jagged edges
- 9. a naturally occurring, inorganic solid with a specific chemical composition and a definite crystalline structure
- 10. the way that a mineral reflects light from its surface
- 11. molten material that forms and accumulates below Earth's surface
- 12. the color of a mineral when it is broken up and powdered
Down
- 1. the ratio of the mass of a substance to the mass of an equal volume of water at 4 degrees Celsius
- 2. a solid in which the atoms are arranged in repeating patterns
- 4. a measure of how easily a mineral can be scratched
- 5. a geometric solid having four sides that are equilateral triangles, resembling a pyramid
- 6. valuable minerals that are prized for their rarity and beauty; very hard and scratch resistant
- 8. when a mineral splits relatively easily and evenly along one or more flat planes