1. GEMSTONES

2. DEFINITION MINERALS that are cut RARE= valuable
Usually above 7 on hardness scale

3. Gold Pure gold is soft (malleable), heavy and expensive!
Gold in jewelry is an alloy (mix of metals)
K= % of gold
24K= 100% gold
14K = ?

4. The 5 C’s
Cut
Clarity
Color
Carat
Cost

5. CUT Ground down on a grinding wheel Faceting- for TLT-TPT
Lets light through mineral; adds brilliance
Cabachoning- for OPQ

6. Diamonds in the “rough”

8. Round brilliant

9. Faceting

10. Cabachoning

11. Cabachons

12. Clarity
Amount of imperfections
Specs
Cracks
discoloration

13. Color Colored gems= deep color, more $$
Diamonds= D-Z scale (see handout)
Exception is Z+ fancy diamonds are colored diamonds- most rare of all

15. D, Fl
I 3

16. Fancy Diamonds
More rare than traditional diamonds.

17. Carat Weight of gemstone 1 ct= 200 mg 100 pts.= 1 carat
TGW= total gem weight for many stones together

19. Cost
Depends on previous 4 C’s

20. FAMOUS DIAMONDS

21. CULLINIAN 9

22. CULLINAN I STAR OF AFRICA 530 CTS.

23. Cullinan II: 317 cts.

24. Kohinoor
Originally 186 cts.
Now 108 cts.
Queen of England

25. HOPE DIAMOND; 65 cts.
New setting
Nov. 2010

26. Smithsonian

28. Tiffany yellow

29. PINK SUNRISE 30 CTS.

30. DeYoung Red 5.03 cts.

31. Taylor-Burton Diamond 68 cts.

32. Smithsonian diamonds

33. MILLENIUM STAR- 230 CTS D, IF (“Millenniums come and go, but a diamond is forever” DeBeers

34. The Regent Diamond 410 carat diamond when originally found.
                                                              
The Regent Diamond
410 carat diamond when originally found.
Later cut down to 140 carats.
Today is at The Louvre.

35. Birthstones

36. Garnet January birthstone

37. ALEXANDRITE
1.6 ct
$16,000

38. OPAL (hydrated quartz)

39. TOPAZ November birthstone

40. Emerald May birthstone

42. Peridot August Birthstone

43. Synthetic gemstones Advantages? Disadvantages? Less expensive
Less flawed
Disadvantages?