Earth science lab
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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.
Identify the following minerals using the Key provided. Place the names with the appropriate number.
1.
2.
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14.
15.
Luster Cleavage Color Name
Properties
Metallic
Luster
Cleavage
present Galena
Shiny,
silver-‐gray;
excellent
cubic
cleavage
No
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°
Light
in
Color
Muscovite
Clear-‐light
brown;
one
plane
of
cleavage;
transparent-‐translucent
Cleavage
Present
Calcite
Clear-‐white;
transparent-‐
translucent;
cleavage
at
75°
Gypsum
Clear-‐white;
transparent-‐
translucent;
one
good
plane
of
cleavage,
two
poor
planes
Non-‐metallic
Luster
Halite
Clear-‐white;
transparent-‐
translucent;
cubic
cleavage
Augite Dark
green;
cleavage
planes
at
90°
Dark
in
Color
Hornblende
Black;
cleavage
planes
at
60°
and
120°
Biotite
Clear-‐black;
one
plane
of
cleavage;
transparent-‐translucent
Light
in
Color
Quartz
Clear-‐translucent;
no
cleavage
Cleavage
Absent
Kaolinite Chalk-‐like;
white
Dark
in
Color Hematite Red-‐brown;
small
round
nodules
Cleavage
plane
1
Cleavage
plane
2
Top
view
1
1
Cleavage
plane
1
2
3
4
5
Broken
end
6
9
8
7
10
11
Side
view
Top
view
12
Top
Bo=om
13
14
15
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