GEOLOGY 1403 LAB MIDTERM

Quartz (Smokey)

Mineral
Color: Smokey
Streak: Colorless
Luster: Vitreous
Cleavage: None
Hardness: 7
Specific Gravity: 2.6-2.7

Quartz (Milky)

Mineral
Color: White
Streak: Colorless
Luster: Vitreous
Cleavage: None
Hardness: 7
Specific Gravity: 2.6-2.7

Quartz

Mineral
Color: Colorless
Streak: Colorless
Luster: Vitreous
Cleavage: None
Hardness: 7
Specific Gravity: 2.6-2.7

Sphalerite

Mineral
Color: Yellow, Brown, Black, Red, Green, White, Colorless
Streak: White to yellowish brown
Luster: Nonmetallic
Cleavage: Perfect in six directions
Hardness: 3.5 - 4.0
Specific Gravity: 3.9-4.1

Sulfur

Mineral
Color: Yellow
Streak: Yellow
Luster: Nonmetallic
Cleavage: None
Hardness: 1.5-2.5
Specific Gravity: 2.0-2.1

Amphibole

Mineral
Color: Black, Dark green
Streak: Colorless
Luster: Dull
Cleavage: 2,2 prismatic
Hardness: 5-6
Specific Gravity: 2.9-3.4

Apatite

Mineral
Color: Green, Brown, Blue, Yellow, Violet, Pink, Colorless
Streak: White
Luster: Vitreous
Cleavage: Poor
Hardness: 5
Specific Gravity: 3.1-3.3

Biotite

Mineral
Color: Black, Dark Green, Dark Brown
Streak: White to gray
Luster: Vitreous
Cleavage: Basal, Perfect
Hardness: 2.5-3.0
Specific Gravity: 2.7-3.4

Calcite

Mineral
Color: Usually white or colorless
Streak: White
Luster: Vitreous
Cleavage: Perfect, three directions
Hardness: 3
Specific Gravity: 2.7

Corundum

Mineral
Color: Gray to Brown
Streak: Colorless
Luster: Vitreous
Cleavage: None
Hardness: 9
Specific Gravity: 3.9-4.1

Fluorite

Mineral
Color: Purple, Green, Yellow, Colorless, Blue, Red, Black
Streak: White
Luster: Vitreous
Cleavage: Four directions, perfect
Hardness: 4
Specific Gravity: 3.2

Galena

Mineral
Color: Bright, Fresh Surfaces
Streak: Lead gray to black
Luster: Metallic
Cleavage: Perfect, 3 directions at 90 degrees
Hardness: 2.5+
Specific Gravity: 7.4-7.6

Gypsum

Mineral
Color: Colorless, Clear, White
Streak: White
Luster: Vitreous
Cleavage: Perfect
Hardness: 2
Specific Gravity: 2.3

Halite

Mineral
Color: Colorless or White
Streak: White
Luster: Vitreous
Cleavage: Perfect, 3 directions at 90 degrees
Hardness: 2.5
Specific Gravity: 2

Hematite

Mineral
Color: Black to Steel-gray to silver, red to reddish black
Streak: Red to Reddish Brown
Luster: Metallic
Cleavage: None
Hardness: 5-6.5
Specific Gravity: 5.0-5.3

Magnetite

Mineral
Color: Black to silvery gray
Streak: Black
Luster: Metallic
Cleavage: None
Hardness: 5-6.5
Specific Gravity: 5.2

Muscovite

Mineral
Color: Black, Brown, or Silver
Streak: White
Luster: Pearly to Vitreous
Cleavage: Perfect
Hardness: 2.5-3
Specific Gravity: 2.8-2.9

Olivine

Mineral
Color: Usually Olive Green
Streak: Colorless
Luster: Vitreous
Cleavage: Poor
Hardness: 6.5-7
Specific Gravity: 3.2-4.4

Plagioclase

Mineral
Color: Usually white or gray. Also colorless, yellow, orange, pink, red, brown, black, blue, green.
Streak: White
Luster: Vitreous
Cleavage: Perfect in 2 directions that intersect at 90 degrees
Hardness: 6.0-6.5
Specific Gravity: 2.6-2.8

Pyrite

Mineral
Color: Brass yellow - often tarnished to dull brass
Streak: Greenish black to brownish black
Luster: Metallic
Cleavage: Breaks with a conchoidal fracture
Hardness: 6-6.5
Specific Gravity: 4.9-5.2

Pyroxene

Mineral
Color: Black
Streak: White, Light Green, Light brown
Luster: Metallic
Cleavage:
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Rhyolite

Igneous Rock
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Scoria

Igneous Rock
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Tuff

Igneous Rock
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Vesic Basalt

Igneous Rock
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Vol Breccia

Igneous Rock
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Andesite

Igneous Rock
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Basalt

Igneous Rock
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Diorite

Igneous Rock
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Gabbro

Igneous Rock
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Granite

Igneous Rock
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Obsidian

Igneous Rock
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Peridotite

Igneous Rock
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Pumice

Igneous Rock
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Rock Salt

Sedimentary Rock
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Sandstone

Sedimentary Rock
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Shale

Sedimentary Rock
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Siltstone

Sedimentary Rock
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Arkose

Sedimentary Rock
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Breccia

Sedimentary Rock
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Chert

Sedimentary Rock
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Coal

Sedimentary Rock
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Conglomerate

Sedimentary Rock
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LS Chalk

Sedimentary Rock
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LS Coquina

Sedimentary Rock
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LS Fossiliferous

Sedimentary Rock
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LS Oolitic

Sedimentary Rock
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Peat

Sedimentary Rock
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Rock Gypsum

Sedimentary Rock
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Schist

Metamorphic Rock
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Serpentine

Metamorphic Rock
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Slate

Metamorphic Rock
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Soapstone

Metamorphic Rock
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Antracite Coal

Metamorphic Rock
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Gneiss

Metamorphic Rock
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Hornfels

Metamorphic Rock
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Marble

Metamorphic Rock
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Phyllite

Metamorphic Rock
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Quartzite

Metamorphic Rock
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