GEOLOGY LAB QUIZ #1 ROCKS

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Last updated 10:21 PM on 4/15/26
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21 Terms

1
New cards

Pyrite

Metallic luster, shiny gold

color, cubic crystals, dark

streak, heavy (dense); MAKES SULFURIC ACID

<p>Metallic luster, shiny gold</p><p>color, cubic crystals, dark</p><p>streak, heavy (dense); MAKES SULFURIC ACID </p>
2
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Galena

Metallic luster, silver
color, heavy (dense), 3
directions of cleavage
at 90 degrees; SOURCE OF LED FOR BULLETS & RECHARGABLE BATTERIES

<p>Metallic luster, silver<br>color, heavy (dense), 3<br>directions of cleavage<br>at 90 degrees; SOURCE OF LED FOR BULLETS &amp; RECHARGABLE BATTERIES </p>
3
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Talc

Pearly white to pale
green, can be
scratched with a
fingernail, soapy feel; BABY POWDER

<p>Pearly white to pale<br>green, can be<br>scratched with a<br>fingernail, soapy feel; BABY POWDER </p>
4
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Garnet

Greenish yellow, 12-
sided (dodecahedral)
crystals, scratches
glass; SANDPAPER

<p>Greenish yellow, 12-<br>sided (dodecahedral)<br>crystals, scratches<br>glass; SANDPAPER</p>
5
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Augite

dark green to black; DECORATIVE BUILDING STONE

<p>dark green to black; DECORATIVE BUILDING STONE</p>
6
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Calcite

Clear to white, 3

directions of cleavage not

at 90 degrees, fizzes in

acid; ANTIACIDS

<p>Clear to white, 3</p><p>directions of cleavage not</p><p>at 90 degrees, fizzes in</p><p>acid; ANTIACIDS</p>
7
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Halite

taste like salt; SALT AND DE-ICING ROADS

<p>taste like salt; SALT AND DE-ICING ROADS </p>
8
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Quartz

Clear, can have prismatic

crystal (hexagonal),

scratches glass, no

cleavage (fracture); JEWLERY, GLASS, WATCH COMPONENTS, SILICON FOR SEMICONDUCTORS

<p>Clear, can have prismatic</p><p>crystal (hexagonal),</p><p>scratches glass, no</p><p>cleavage (fracture); JEWLERY, GLASS, WATCH COMPONENTS, SILICON FOR SEMICONDUCTORS </p>
9
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Sulfur

Yellow, smells like eggs,

no cleavage; EXPLOSIVES, GUNPOWDER, FERTILIZER, MEDICINE

<p>Yellow, smells like eggs,</p><p>no cleavage; EXPLOSIVES, GUNPOWDER, FERTILIZER, MEDICINE</p>
10
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Gypsum

White, striated, can be

scratched with a

fingernail; CERAMICS & DRYWALL

<p>White, striated, can be</p><p>scratched with a</p><p>fingernail; CERAMICS &amp; DRYWALL</p>
11
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Olivine

Glassy luster, lime
green color; JEWELRY & IRON FOR STEEL

<p>Glassy luster, lime<br>green color; JEWELRY &amp; IRON FOR STEEL </p>
12
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Hematite

Reddish brown streak,
metallic luster, silver
color (see also reddish
version); JEWELRY & IRON FOR STEEL

<p>Reddish brown streak,<br>metallic luster, silver<br>color (see also reddish<br>version); JEWELRY &amp; IRON FOR STEEL </p>
13
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Biotite Mica

Black-gold, 1 direction
of cleavage; PAINT FILLER & ELECTRICAL INSULATOR

<p>Black-gold, 1 direction<br>of cleavage; PAINT FILLER &amp; ELECTRICAL INSULATOR</p>
14
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Muscovite

Silvery grey, 1 direction
of cleavage (peels into
sheets), scratch with
fingernail; MAKE-UP & ELECTRICAL INSULATOR

<p>Silvery grey, 1 direction<br>of cleavage (peels into<br>sheets), scratch with<br>fingernail; MAKE-UP &amp; ELECTRICAL INSULATOR </p>
15
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Magnetite

Magnetic, black, dull
but (metallic luster on
fresh surface), dense,
dark streak; MAGNETS & IRON FOR STEEL

<p>Magnetic, black, dull<br>but (metallic luster on<br>fresh surface), dense,<br>dark streak; MAGNETS &amp; IRON FOR STEEL </p>
16
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Potassium Feldspar

Pink color, striations, 2
directions of cleavage
at 90 degrees, can
scratch glass; FALSE TEETH & CEREMICS

<p>Pink color, striations, 2<br>directions of cleavage<br>at 90 degrees, can<br>scratch glass; FALSE TEETH &amp; CEREMICS</p>
17
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Graphite

Dull metallic luster,
silver grey streak,
greasy feel, writes on
paper, low density; INDUSTRIAL LUBE & LED (PENCILS)

<p>Dull metallic luster,<br>silver grey streak,<br>greasy feel, writes on<br>paper, low density; INDUSTRIAL LUBE &amp; LED (PENCILS)</p>
18
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Kaolinite

Soft, powdery

appearance, sticks to

tongue (don’t!). ; CERAMICS

<p>Soft, powdery</p><p>appearance, sticks to</p><p>tongue (don’t!). ; CERAMICS</p>
19
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Plagioclase Feldspar

Whitish blue, two
directions of cleavage
at 90 degrees,
scratches glass; JEWELRY AND CERAMICS

<p>Whitish blue, two<br>directions of cleavage<br>at 90 degrees,<br>scratches glass; JEWELRY AND CERAMICS</p>
20
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Corundum

Dark red color, can
scratch glass and all
the other minerals,
hexagonal crystals; RUBY & SAPHIRE

<p>Dark red color, can<br>scratch glass and all<br>the other minerals,<br>hexagonal crystals; RUBY &amp; SAPHIRE </p>
21
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Copper

blackish-green
corrosion; metallic
luster; ELECTRICAL WIRING & COINS

<p>blackish-green<br>corrosion; metallic<br>luster; ELECTRICAL WIRING &amp; COINS </p>