Minerals

1. a geometric solid having four sides that are equilateral triangles.
3. mineral that contains silicon oxygen and usually one or more other elements.
6. rare precious highly prized mineral that can be cut polished or used for jewelry.
10. the manner in which a mineral breaks along planes where atomic bonding is weak.
11. when a mineral breaks into pieces with arclike rough or jagged edges.
12. color a mineral leaves when it is rubbed across an unglazed porcelain plate or when it is broken up and powdered.

2. mineral that contains a valuable substance that can be mined at a profit.
4. solid in which atoms are arranged in repeating patterns.
5. ratio of the mass of a substance to the mass of an equal volume of water at 4 degrees celsius.
7. naturally occurring inorganic solid with a specific chemical composition and a definite crystalline structure.
8. measure of how easily a mineral can be scratched.
9. the way a mineral reflects light from its surface.