Earth Science #4

Identify the following minerals using the Key provided. Place the names with the appropriate number.

Augite, Biotite, Calcite, Galena, Graphite, Gypsum, Halite, Hematite, Hornblende, Kaolinite, Microcline (Orthoclase), Muscovite, Plagioclase, Pyrite, Quartz

1.        Hornblende- cleavage planes at 60 degrees

2.       Galena- shiny and silver gray with a discernible cubic cleavage

3.       Plagioclase-light grey

4.       Graphite- shiny, silver-gray; no form

5.       Quartz

6.       Microcline- peachy pink color

7.       Pyrite-brassy yellow

8.       Biotite

9.       Muscovite- clear light brown; transparent-translucent

10.    Calcite- clear white; transparent-translucent

11.    Halite- cubic cleavage

12.    Gypsum- clear-white; transparent-translucent.

13.   Augite-90 degree cleavage; dark green.

14.    Hematite- small round nodules; red brown in color

15. Kaolinite- chalk-like; white