1. The softest mineral
talc

2. Breakage that is rough and jagged
fracture

3. A mineral mined for profit
ore

4. Breakage along smooth flat planes
cleavage

5. How easily a mineral can be scratched
hardness

6. Naturally occurring inorganic solid with a definite structure and composition
mineral

7. Mineral containing silicon, oxygen, and one other mineral
silicate

8. How light is reflected from a mineral
luster

9. Mineral that has magnetic properties
magnetite

10. Solid with repeating arrangement of atoms
crystal

11. The ore that contains aluminum
bauxite

12. The two types of luster
metallic and nonmetallic

13. Name of the mineral that is table salt
halite

14. Color a mineral leaves on a tile
streak

15. Valuable rare mineral
gem

16. State mineral of Missouri
galena

17. Mineral obtained from ilmenite or rutile
titanium

18. Called fool’s gold
pyrite

19. The hardest mineral
diamond

20. Name of the mineral that produces a double image
calcite