Term
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Definition
Color: Silvery white
Streak: light grey to silver
Hard: 2.5
S.G.: 10.0 - 12
Chrystal Structure: Cubic Breakage Pattern: Hackly
Other:
Uses and Other Properties: Malleable and ductile |
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Term
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Definition
Color: Bronze
Streak: Gray to Black
Hardness: 4.0
S.G.: 4.6
Chrystal Structure: Hexagonal Breakage Pattern: uneven fracture Other:
Uses and Other Properties: May be magnetic, found with pentlandite + nickle ore
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Term
Chalcopyrite (CuFeS2)
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Definition
Color: Brassy to golden yellow
Streak: Greenish black
Hard: 3.5 - 4.2
S.G.: 4.2
Chrystal Structure: Tetragonal
Breakage Pattern: uneven fracture
Other:
Uses and Other Properties: Main ore of copper |
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Term
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Definition
Color: Copper red
Streak: Copper red
Hardness: 3.0
S.G.: 8.5 - 9
Chrystal Structure: Cubic
Breakage Pattern: Hackly
Other: looks like penny
Uses and Other Properties: malleable and ductile |
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Term
Bornite (Cu5FeS4)
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Definition
Color: Bronze, tarnishes to dark blue, purple
Streak: Gray - black
Hardness: 3.0
S.G.: 4.9 - 5.4
Chrystal Structure: Tetragonal
Breakage Pattern: uneven fracture
Other:
Uses and Other Properties: source of copper, "peacock ore" purple shine when tarnished |
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Term
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Definition
Color: Pale to golden, yellow
Streak: Yellow
Hardness: 2.5 -3.9
S.G.: 19.3 (Extremely Heavy)
Chrystal Structure: Cubic
Breakage Pattern: hackley
Other:
Uses & Other Properties: Does not tarnish |
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Term
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Definition
Color: Gray
Streak: Gray to Black
Hard: 2.5
S.G.: 7.5 (heavy)
Chrystal Structure: Cubic
Breakage Pattern: cubic cleavage (perfect) Other: Very Shiny
Uses & Other Properties: source of lead, fishing equipment sinkers |
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Term
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Definition
Color: Black to Gray
Streak: Black to Gray
Hardness: 1.2
S.G.: 2.3
Chrystal Structure: Hexagonal
Breakage Pattern: Basal Clevage (scales)
Other: Greasy to touch (feels, looks like pencil lead
Uses & Other Properties: Pencil Lead... |
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Term
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Definition
Color: light, brassy, yellow
Streak: greenish black
Hard: 6.5
S.G.: 5.0
Chrystal Structure: Cubic
Pattern: uneven fracture
Other: Pale yellow (lighter than chalcopyrite and pyrrhotite)
Uses and Other Properties: fools gold source of iron
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Term
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Definition
Color: brown
Streak: pale yellow
Hard: 3.5 - 4
S.G.: 4.0
Chrystal Structure: Cubic
Pattern: clevage in 6 directions
Other:
Uses and Other Properties: Main ore of zinc
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Term
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Definition
Color: gray, red, white, brown
Streak: gray - yellow
Hard: 1.0 -3.0
S.G.: 2.0 - 2.5
Chrystal Structure: -------
Breakage Pattern: ------
Other:
Uses and Other Properties: source of aluminum
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Term
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Definition
Color: scarlet red
Streak: scarlet red
Hard: 2 - 2.5
S.G.: 8.1
Chrystal Structure: Hexagonal
Pattern: poor clevage
Other:
Uses and Other Properties: Mercury ore
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Term
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Definition
Color: yellow
Streak: pale yellow
Hard: 2.0
S.G.: 2.0
Chrystal Structure: Orthorombic
Breakage Pattern: conchoidal fracture
Other:
Uses and Other Properties: medicine, fungicides, sulfuric acid
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Term
Orpiment & Realgar
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Definition
Color: yellow and orange
Streak: orange - yellow
Hard: 1.5 - 2
S.G.: 3.5
Chrystal Structure: Monoclinic
Pattern: clevage
Other:
Uses and Other Properties: Arsenic ore, tanning hides, fireworks
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