1. MINERALS
Chapter 5 Review

2. Properties of a Mineral
Naturally occurring
Solid
Definite chemical composition
(element or compound)
Atoms arranged in a regular repeating pattern-Crystal system
Inorganic

3. How Can I Identify Unknown Minerals?
By Observing their Properties
Color, Luster, Crystal Shape
By Performing Simple Tests
Cleavage-Fracture, Hardness,
Streak, Acid Reaction
By Looking for Unique Properties
Double Refraction, Fluorescence,
Magnetism

4. Color- not reliable Few minerals have a unique color ex: sulfur
Many minerals have the same color
Some minerals come in a variety of colors
ex: quartz

5. LUSTER- the way a mineral reflects light
Non-metallic-pearly
Non-metallic- vitreous
Metallic
Non-metallic-earthy or dull

7. CLEAVAGE- when a mineral breaks into smooth planes

8. FRACTURE- the way a mineral breaks, no planes

9. Acid Test
If you drop acidic solution on minerals that contain calcium carbonate,
Carbon Dioxide bubbles will be given off!

10. DOUBLE REFRACTION

11. Hardness Test- scratch mineral

12. STREAK- color of powdered mineral

13. FLUORESCENCE

14. Magnetism-contains Iron

15. Chatoyancy & Asterism

16. Over 3,000 different minerals
20 Common minerals
10 Rock Forming minerals
Quartz, Feldspar (2), Halite, Mica(2),
Calcite, Dolomite, Gypsum, Ferromagnesium Minerals

17. TONIGHT GO TO http://www.cobweb.net/~bug2/mineral.htm
to take an on-line quiz about minerals