Percent estimation practice Kutztown University GEL220 - Mineralogy Friehauf 2009

Sample A

5.2%

Sample B

8.7%

Sample C

5.8%

Sample D

1.9%

Sample E

21.3%

Sample F

4.4%

Sample G

38.7%

Sample H

1.3%

Sample I

6.9%

Sample J

6.1%

Sample K

12.0%

Sample L

25.3%

Sample M

4.8%

Sample N

6.9% Dark gray grains 8.1% Light gray grains

Sample O

9.4% White grains

Sample P

33.6%

Sample Q

13.9%

Sample R

9.4% Blue grains 12.5% Red grains

Sample T (Yosemite granite)

23.8% Black grains

I hope this helps!