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Mineral Portfolio
Mineralogy, EASC 200Fall, 2007
Montana State - Billings
Casey Heisler
*referred to Wikipedia for some information
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Layout of PresentationLayout of Presentation
ElementsElements OxidesOxides SulfidesSulfides SulfatesSulfates CarbonatesCarbonates PhosphatesPhosphates HalidesHalides SilicatesSilicates
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CopperCu
Physical Properties:Luster: MetallicColor: Copper-redStreak: Copper-redHardness: 2.5-3Fracture: Hackly
Occurrence: Most are found with basaltic lavas
Crystallography: Isometric
Use: Wiring
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Graphite
C
Physical Properties:Luster: OpaqueColor: Gray or BlackStreak: BlackHardness: 1-2Fracture: Flaky
Occurrence:
Use: Pencil lead
Crystallography: Hexagonal (6/m 2/m 2/m). Most forms are tabular, six-sided foliated masses, granular to compacted masses
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Diamond
C
Physical Properties:Luster: AdamantineColor: ClearStreak: White Hardness: 10Fracture: Conchoidal
Occurrence:
Use: Rings and jewelry
Crystallography: Isometric-Hexoctahedral (Cubic)
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Sulfur
Physical Properties:Luster: OpaqueColor: YellowStreak: Hardness: 2.0Fracture: Diagnostic Features:
Occurrence:
Use: Gunpowder and some rubber
Crystallography: Orthorhombic
S
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Quartz
Physical Properties:Luster: VitreousColor: ClearStreak: WhiteHardness: 7Fracture: Conchoidal
Use: quartz clocks, crystal oscillator
Crystallography: 6 sided prism
SiO2
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Hematite
Physical Properties:Luster: MetallicColor: Metallic or RedStreak: RedHardness: 5.5-6.5Fracture: Uneven
Use: Pigment
Crystallography: Hexagonal
Fe2O3
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Magnetite
Physical Properties:Luster: MetallicColor: Black or grey Streak: BlackHardness: 5.5-6.5Fracture: Uneven
Use:
Crystallography: Octahedral, Isometric
Fe3O4
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Geothite
Physical Properties:Luster: Adamantine or dullColor: Yellowish-brownStreak: Yellowish-brownHardness: 5-5.5Fracture: Uneven
Use: An ore of iron
Crystallography: Orthorhombic
FeO(OH)
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Corundum
Physical Properties: Luster: Adamantine, dull, vitreousColor: brown, pink, or blueStreak: WhiteHardness: 9Fracture: Conchoidal
Use: Used as gemstones and abrasives
Crystallography: Hexagonal
Al2O2
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Pyrite
FeS2
Physical Properties:Luster: MetallicColor: pale brass yellowStreak: greenish or brownish black Hardness: 6-6.5Fracture: Conchoidal, brittle
Use: Sometimes used as an iron ore, and mined to be able to find gold or copper
Crystallography: Isometric;__
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Chalcopyrite
Physical Properties:Luster: MetallicColor: Brass-yellowStreak: Greenish-blackHardness: 3.5-4Fracture: Conchoidal
Use: Important ore of copper
Crystallography: Tetragonal
CuFeS2
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Galena
Physical Properties:Luster: MetallicColor: Lead-grayStreak: Lead-grayHardness: 2.5Fracture: Flat
Use: One of the only sources of lead which is important for batteries. It is also an important ore of silver
Crystallography: Isometric
PbS
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Sphalerite
Physical Properties:Luster: Nonmetallic, resinousColor: Colorless when pureStreak: white or yellow and brownHardness: 3.5-4Fracture:
Use: It is the most important ore of Zinc
Crystallography: Isometric
ZnS
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Anhydrite
Physical Properties:Luster:Color:Streak: Hardness:Fracture:
Use:
Crystallography:
CaSO4
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Chalcoyrite
CuFeS2
Physical Properties:Luster: MetallicColor: pale brass yellowStreak: greenish or brownish black Hardness: 6-6.5Fracture: Conchoidal, brittleDiagnostic Features: distinguished from gold by its brittleness and hardness, from chalcopyrite by its greater hardness and brittleness.
Crystallography: Tetragonal; 42m Most common forms are cubic and octahedron, w. striated faces. Also massive, granular, reniform, globular and stalagtitic.
Cubo-octahedral form
Pyrite Twins
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Pyrite (continued)
Use:
Other:
Occurrence: the most common sulfide, forms at both high and low temperatures,
Chaclopyrite