1. Percent estimation practice Kutztown University GEL220 - Mineralogy Friehauf 2009

2. Sample A

3. 5.2%

4. Sample B

5. 8.7%

6. Sample C

7. 5.8%

8. Sample D

9. 1.9%

10. Sample E

11. 21.3%

12. Sample F

13. 4.4%

14. Sample G

15. 38.7%

16. Sample H

17. 1.3%

18. Sample I

19. 6.9%

20. Sample J

21. 6.1%

22. Sample K

23. 12.0%

24. Sample L

25. 25.3%

26. Sample M

27. 4.8%

28. Sample N

29. 6.9% Dark gray grains 8.1% Light gray grains

30. Sample O

31. 9.4% White grains

32. Sample P

33. 33.6%

34. Sample Q

35. 13.9%

36. Sample R

37. 9.4% Blue grains 12.5% Red grains

38. Sample T (Yosemite granite)

39. 23.8% Black grains

40. I hope this helps!