1. Chapter 4 - Minerals

2. Mineral - definition Naturally occurring Inorganic Solid
Specific chemical composition
Definite crystalline structure

3. Mineral Systems
If space is not restricted, a mineral will exhibit a crystal pattern with a definite number of sides and specific angles.

4. Mineral Identification
Hardness – the ability to resist scratching; ranges from 1 (softest) to 10 (hardest)

5. Mineral Identification
Streak
_________ – the color of the powdered form of a mineral

6. Mineral Identification
_________– the way a mineral reflects light
In our class we will use three terms:
_______– not reflecting light well
_______ – reflects like water or glass
________– reflects like a metal
Luster
dull
glassy
metallic

7. Mineral Identification
Cleavage (flat surfaces) or Fracture (no flat surfaces) – the way a mineral __________
breaks

8. Review color luster texture streak hardness cleavage fracture
specific gravity