Geology Lab- Mineral Identification

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22 Terms

1
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Hematite

-Red or dark grey color
-Either color has a red streak
-Metallic Luster
-Non magnetic
-Hardness 1-6

<p>-Red or dark grey color<br>-Either color has a red streak<br>-Metallic Luster<br>-Non magnetic<br>-Hardness 1-6</p>
2
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Gypsum

-Milky white/yellow color
-White streak
-Non metallic luster
-Good Cleavage
-Hardness 2- very soft- can scratch with fingernail

<p>-Milky white/yellow color<br>-White streak<br>-Non metallic luster<br>-Good Cleavage <br>-Hardness 2- very soft- can scratch with fingernail</p>
3
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"K-spar" (potassium feldspar)

-Peach/pink/white color
-White
-Non metallic luster
-Not magnetic
-90 degree cleavage
-Very square
-Hardness 6

<p>-Peach/pink/white color<br>-White<br>-Non metallic luster<br>-Not magnetic<br>-90 degree cleavage<br>-Very square<br>-Hardness 6</p>
4
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Magnetite

-Silvery Gray/Black color
-Black Streak
-MAGNETIC

<p>-Silvery Gray/Black color<br>-Black Streak<br>-MAGNETIC</p>
5
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Quartz (Milky)

-Milky white color
-Grey/white streak
-Non metallic
-no flat faces
-conchoidal fracture
-Hardness 7

<p>-Milky white color<br>-Grey/white streak<br>-Non metallic<br>-no flat faces<br>-conchoidal fracture<br>-Hardness 7</p>
6
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Fluorite

-Green color
-Translucent
-Non metallic
-Hardness 4
-White streak

<p>-Green color<br>-Translucent<br>-Non metallic<br>-Hardness 4<br>-White streak</p>
7
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Muscovite

-Silver/grey/light brown color
-White streak
-Mica
-Flaky
-Greasy
-1 perfect cleavage

<p>-Silver/grey/light brown color<br>-White streak<br>-Mica<br>-Flaky<br>-Greasy<br>-1 perfect cleavage</p>
8
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Biotite

-Dark bronze/black color
-Tan/white streak
-Thin flaky
-"black mica"

<p>-Dark bronze/black color<br>-Tan/white streak<br>-Thin flaky<br>-"black mica"</p>
9
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Talc

-Milky white color
-Greasy/waxy
-Hardness 1
-Can scratch with fingernail
-White streak

<p>-Milky white color<br>-Greasy/waxy<br>-Hardness 1<br>-Can scratch with fingernail <br>-White streak</p>
10
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Galena

-Bright silver color
-Metallic
-Very heavy
-Hardness 2.5

<p>-Bright silver color<br>-Metallic<br>-Very heavy <br>-Hardness 2.5</p>
11
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Pyrite

-Gold/silver color
-Metallic
-Fools gold
-Hard
-Grey streak

<p>-Gold/silver color<br>-Metallic <br>-Fools gold<br>-Hard<br>-Grey streak</p>
12
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Graphite

-Dark grey/black color
-Very soft
-Leaves a streak on your hand
-Grey streak
-Can streak on paper

<p>-Dark grey/black color<br>-Very soft<br>-Leaves a streak on your hand<br>-Grey streak<br>-Can streak on paper</p>
13
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Chert

?

14
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Olivine

-Shades of green colors
-Specks of black
-White streak
-Non metallic
-Resembles sand grains

<p>-Shades of green colors<br>-Specks of black<br>-White streak<br>-Non metallic<br>-Resembles sand grains</p>
15
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Calcite

-Clear/white
-White streak
-Has 3 cleavage directions
-Fizzes in acid

<p>-Clear/white<br>-White streak<br>-Has 3 cleavage directions<br>-Fizzes in acid</p>
16
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Quartz (Crystal)

-Colorless and transparent
-Crystal form

<p>-Colorless and transparent<br>-Crystal form</p>
17
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Garnet

-Green/brown/red/white
-White streak
-Non metallic
-No cleavage
-Hardness 7

<p>-Green/brown/red/white<br>-White streak<br>-Non metallic<br>-No cleavage<br>-Hardness 7</p>
18
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Plagioclase Feldspar

-Stirations(hairline fractures)
-White color/or just a light color
-Not 90 degree cleavages
-Hardness 6

<p>-Stirations(hairline fractures)<br>-White color/or just a light color<br>-Not 90 degree cleavages <br>-Hardness 6</p>
19
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Hornblende (amphibole)

-Black/white/yellow color
-56 degree and 124 degree angles
-Doesn't have a square cleavage
-No streak
-Hardness 5.5

<p>-Black/white/yellow color<br>-56 degree and 124 degree angles<br>-Doesn't have a square cleavage <br>-No streak<br>-Hardness 5.5</p>
20
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Augite (Pyroxene)

-Green/black
-White streak
-90 degree cleavage
-Hardness 5.5

<p>-Green/black <br>-White streak<br>-90 degree cleavage <br>-Hardness 5.5</p>
21
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Halite

-Clear
-Tastes like salt
-Cubic Cleavage
-White streak
-Hardness 2

22
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Malachite

-Teal/and mixes of other colors
-Looks like a corroded penny
-Hardness 3.5
-Green streak

<p>-Teal/and mixes of other colors<br>-Looks like a corroded penny<br>-Hardness 3.5<br>-Green streak</p>

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