1. Rocks & Minerals Li Chung Ming, Pavel Zinin Ruth Jia & Tayro Acousta Amazing Minerals

2. Minerals are ……. the chemicals that make up the rocks

3. 4 important elements for a mineral Naturally-occurring Inorganic Solid Fixed Chemical Composition Crystalline

4. Is diamond a mineral?

5. Yes, diamond is a mineral It has been found in many different parts of the earth as shown below

6. Many diamonds were found in the kimberlite pipe, Kimberley, South Africa

7. Diamond is crystalline with a fixed chemical composition -- carbon (C) A single crystal with a well-developed external form The unit cell of diamond structure showing how carbon atoms inside are arranged.

8. Do you know how many minerals have been found so far ?

9. There are about 3000 known minerals so far. Only 200 of them are commonly observed. 20 of them are important rock- forming minerals.

10. 7 Amazing Minerals

11. 1. Diamond

12. The hardest mineral on earth “Diamond is forever”

13. 2. Quartz

14. The most abundant mineral on the earth’s surface -- quartz (rock crystal) SiO 2

15. The mineral we eat daily –table salt NaCl (halite) Na +1 Cl -1 The mineral halite has a typical ionic bonding between Na +1 and Cl -1 The unit cell is face-center cubic

16. 3. Mica

17. The mineral that looks like a stack of papers mica – a sheet silicate

18. 4. Magnetite

19. The mineral that attracts iron metals magnetite – an iron oxide (Fe 3 O 4 )

20. 5. Pyrite

21. The yellow mineral that fools many people as gold The cubic crystal of pyrite Crystal structure – a face-center cubic pyrite (FeS 2 )

22. Interesting features of pyrite, FeS 2 The black color for pyrite powder Clear striations on the surface The simplest way to produce powder from minerals is to scratch a sharp edge of a specimen against a rough & hard ceramic plate. You may try a pyrite specimen on the table to see if it is correct.

23. 6. Ice

24. The mineral that floats on water Ice – the solid form of water, H 2 O

25. 7. Olivine

26. A green mineral called Hawaii diamond Olivine – a silicate, (Fe, Mg) 2 SiO 4

27. Interesting facts about the olivine mineral It is the major component for the green sand. It is the first mineral crystallized out from the molten magma. Puu Mahana, Green Sand Beach, Hawaii olivine crystals in the basalt

28. The most abundant mineral in the earth’s upper mantle (below the crust and above 410 km depth)

29. Thank you for coming The End Mahalo