1. Minerals

2. Minerals
Minerals are naturally occurring, inorganic, substances with a definite chemical composition.

3. Characteristics
Cleavage & Fracture
Streak and Luster
Hardness
Color

4. Streak
The color produced by scratching a sample on a porcelain plate

5. Hardness (Mohs Scale)
Resistance to being scratched (10 is hardest, 1 is softest)

6. Cleave/Fracture The way a mineral breaks Cleave = smooth
Fracture = rough

7. Luster
The way a mineral reflects light (metallic, glassy, earthy)

8. Reaction to Acid
The way a mineral fizzes when hydrochloric acid is applied

9. Density
Ratio of mass to volume… g/cm3

10. Magnetism
Whether or not a mineral can attract iron or other metals