1. Minerals Mr. Skirbst Earth Science Topic 22

2. Minerals Naturally occurring, inorganic solid that has a definite chemical composition and crystal structure

3. 5 Characteristics of Minerals 1.Naturally occurring – Found in nature, not synthetic

4. 5 Characteristics of Minerals 1.Naturally occurring - 2.Inorganic - Not formed by or from living things

5. 5 Characteristics of Minerals 1.Naturally occurring - 2.Inorganic - 3.Solid - Definite shape and volume

6. 5 Characteristics of Minerals 1.Naturally occurring - 2.Inorganic - 3.Solid - 4.Definite Composition - Has a specific chemical formula

7. 5 Characteristics of Minerals 1.Naturally occurring - 2.Inorganic - 3.Solid - 4.Definite Composition - 5.Crystal Structure - Repeating pattern of atoms

8. Mineral Identification

9. 1. Color

10. Mineral Identification 1.Color Very variable, Not reliable

11. Mineral Identification 2.Luster

12. Mineral Identification 2.Luster The way light reflects off surface (metallic or non-metallic)

13. Mineral Identification 3.Hardness

14. Mineral Identification 3.Hardness Resistance to scratching (Mohs scale and field hardness)

15. Mineral Identification 4.Streak

16. Mineral Identification 4.Streak Color of powder when rubbed (streak plate is used)

17. Mineral Identification 5.Density

18. Mineral Identification 5.Density Mass per unit volume (“heft” used in field)

19. Mineral Identification 6.Crystal Shape

20. Mineral Identification 6.Crystal Shape Six basic shapes

21. Mineral Identification 7.Breakage

22. Mineral Identification 7.Breakage The way a mineral breaks:

23. Mineral Identification 7.Breakage The way a mineral breaks: Cleavage – smooth surface

24. Mineral Identification 7.Breakage The way a mineral breaks: Cleavage – smooth surface Fracture – rough surface

25. Mineral Identification 8.Special Properties

26. Mineral Identification 8.Special Properties magnetic, radioactive, odor, taste, glow, chemically reactive

27. Mohs Hardness Scale 1.6. 2.7. 3.8. 4.9. 5.10.

28. Field Hardness Scale 1.6. 2.7. 3.8. 4.9. 5.10.