Geo- Mineral Properties and Identification

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Sphalerite (ZnS)

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24 Terms

1

Sphalerite (ZnS)

-light brown streak -sulfur smell

<p>-light brown streak -sulfur smell</p>
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2

Galena (PbS) -lead

-heavy palm weight -cubic cleavage -metallic dark grey streak

<p>-heavy palm weight -cubic cleavage -metallic dark grey streak</p>
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3

Gypsum -sheet rock

-scratch with fingernail -chalky white streak -layered sheets of cleavage

<p>-scratch with fingernail -chalky white streak -layered sheets of cleavage</p>
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4

Hematite (Fe2O3) -iron = red

-metallic -auburn streak

<p>-metallic -auburn streak</p>
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5

Halite (NaCl) -salt

-90 degree cleavage -white chalky streak

<p>-90 degree cleavage -white chalky streak</p>
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6

Graphite (C)

-messy -pencil material

<p>-messy -pencil material</p>
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7

Flourite (CaF2)

-octahedral cleavage -color from inside out -varies colors

<p>-octahedral cleavage -color from inside out -varies colors</p>
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8

Magnetite (Fe3O4)

-magnetic

<p>-magnetic</p>
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9

Kaolinite Clay

-extremely light palm-weight -powdery material

<p>-extremely light palm-weight -powdery material</p>
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10

Hematite (Fe2O3) -iron = red

-red/orange streak -earthy luster

<p>-red/orange streak -earthy luster</p>
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11

Calcite (CaCO3)

-lacks 90 degree cleavage -highly reactive to acid

<p>-lacks 90 degree cleavage -highly reactive to acid</p>
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12

Pyrite (FeS2)

-cubic cleavage -"fools gold"

<p>-cubic cleavage -&quot;fools gold&quot;</p>
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13

Quartz (SiO2)

-scratches glass -no defined cleavage

<p>-scratches glass -no defined cleavage</p>
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14

Biotite

-flakes off -1 cleavage set

<p>-flakes off -1 cleavage set</p>
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15

Feldspar (Orthoclase)

-barely scratches glass -salmon pink

<p>-barely scratches glass -salmon pink</p>
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16

Pyroxene (Augite)

-close to 90 degree cleavage -no streak -can be greenish

<p>-close to 90 degree cleavage -no streak -can be greenish</p>
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17

Olivine

-no cleavage -olive green color

<p>-no cleavage -olive green color</p>
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18

Talc

-soapy feeling -pearly luster

<p>-soapy feeling -pearly luster</p>
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19

Feldspar (Na- Plagioclase) -white color = Na

-striations present -no streak -reflects light

<p>-striations present -no streak -reflects light</p>
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20

Muscovite

-flaky -1 cleavage set

<p>-flaky -1 cleavage set</p>
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21

Amphibole (Al2O3)

-tight planes -unique light pattern

<p>-tight planes -unique light pattern</p>
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22

Feldspar (Ca- Plagioclase) -deep black color = Ca

-striations on face -no streak

<p>-striations on face -no streak</p>
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23

Quartz (SiO2)

-scratches glass -no cleavage

<p>-scratches glass -no cleavage</p>
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24

Garnet -can be green

-dodecahedron -no streak -red undertone

<p>-dodecahedron -no streak -red undertone</p>
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