1. How could you tell these minerals apart to determine which is which?
Fluorite
halite
Talc
Topaz

2. Identifying Minerals
Cornell Notes Page 131.

3. (How can we identify which mineral is which?)
8 Ways to Identify Minerals

4. 1. Color

5. Discuss- why wouldn’t color be the best way to identify minerals?

6. 2. Luster the way the mineral’s surface reflects light.
metallic, earthy, waxy, greasy, glassy

7. Luster
Resinous luster

8. Discuss…
How is luster different from color?

9. 3. Streak-- the color of the powder

10. Streak – the color of the powder

11. Discuss…
How do you find a minerals streak?

12. -Cleavage 4. The way the mineral breaks
-breakage occurs along smooth,flat surfaces

13. Examples of Cleavage

14. -Fracture
Breakage occurs in curved or irregular shapes

15. Discuss…
How are cleavage and fracture different?

16. 5. Hardness resistance to scratching Mohs Hardness Scale 1-10
Talc-- 1 (SOFTEST)
Diamond 10 (Hardest)

17. Discuss… What does hardness mean when referring to minerals?
What scale do we use to measure hardness?

18. 6. Density Minerals have different densities
How much MASS something has in relation to its size
Pyrite= 5.01g/cm3

19. 7. Crystal Systems
Minerals can form different shaped crystals with varying numbers of sides.

20. 8. Special Properties
Some properties only apply to a few types of minerals
Fluorescence
Magnetism
Chemical Reactions
Taste
Optical Properties
Radioactivity

21. example of optical properties
Calcite
Quartz

22. Review
1. What is a mineral’s streak?
2. What are 7 other ways to ID minerals?

23. Your House Comes From a Mine
Clay 1. 2. 3. 4.
Limestone
Copper
Gypsum
Iron 1. 2. 3. 4. 5. 6.
Petroleum 1. 2. 3. 4. 5.