GEO Week 3


Question Description

Using the Key and the Mineral Images Guide, identify the 15 minerals.  On the Word file provided, list the identified minerals by number, and briefly explain how you identified each.

GEO101L_Lab3_Key - Minerals.pdf 


GEO101L_Lab3_Answer sheet.docx 

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Luster Metallic  Luster Cleavage Color Cleavage  present Name   Galena No  Cleavage Light  in  Color Cleavage  Present Non-­‐metallic  Luster Dark  in  Color Light  in  Color Cleavage  Absent Dark  in  Color Properties Shiny,  silver-­‐gray;  excellent  cubic   cleavage Graphite Shiny,  silver-­‐gray;  no  form Pyrite Brassy-­‐yellow;  often  as  a  collection   of  cubic  crystals Plagioclase Light  gray-­‐white  color;  two  planes   of  cleavage  at  90° Microcline   (Orthoclase) Peachy-­‐pink  color;  two  planes  of   cleavage  at  90° Muscovite   Clear-­‐light  brown;  one  plane  of   cleavage;  transparent-­‐translucent Calcite   Clear-­‐white;  transparent-­‐ translucent;  cleavage  at  75° Gypsum Clear-­‐white;  transparent-­‐ translucent;  one  good  plane  of   cleavage,  two  poor  planes Halite Clear-­‐white;  transparent-­‐ translucent;  cubic  cleavage Augite Dark  green;  cleavage  planes  at  90° Hornblende Black;  cleavage  planes  at  60°  and   120° Biotite   Clear-­‐black;  one  plane  of  cleavage;   transparent-­‐translucent Quartz   Clear-­‐translucent;  no  cleavage Kaolinite Chalk-­‐like;  white Hematite Red-­‐brown;  small  round  nodules Cleavage  plane  1   1   Cleavage  plane  2   Top  view   1   Cleavage  plane  1   2   3   5   4   6   Broken  end   8   7   9   10   Side  view   11   Top  view   12   Top     Bo=om       13   14   15   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. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. ...
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