| A | B |
|---|
| minerals | naturally occuring inorganic solids with definite structure and composition |
| crystal | inorganic solid whose atoms are arranged in a repeating pattern |
| silicates | most common rock forming mineral |
| oxygen | silicates contain silicon, ___, and usually one other element |
| Hardness | how easily a mineral is scratched |
| Luster | how light is reflected |
| metallic | luster can be __ or nonmetallic |
| streak | color of a mineral when it is crushed into powder |
| cleavage | breaking along a smooth flat surface |
| fracture | minerals that break with a rough edge |
| gems | rare and beautiful minerals |
| ore | mineral that has a useful substance that can be mined at a profit |
| titanium | strong metal from limenite or rutile |
| types of rock | igneous, sedimentary, metamorphic |
| rocks | mixture of minerals, mineraloids, glass, and organic matter |
