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Geology 211 > Physical Properties > Flashcards

Physical Properties Flashcards

1
Q

Minerals with a hardness above 7 (3)

A

Spinel, Corundum, Diamond

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2
Q

List the clinopyroxenes from lightest to darkest colour

A

Diopside, Augite, Aegerine

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3
Q

Cleavage of pyroxenes

A

2 cleavages @ 90 degrees

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4
Q

Cleavage of amphiboles

A

2 cleavages @ 124 + 56 degrees

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5
Q

Magnetic minerals (2)

A

Magnetite and Pyrrhotite

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6
Q

Weakly magnetic minerals (2)

A

Ilmenite and Chromite

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7
Q

Minerals with a high SG (5)

A

Galena, Aragonite, Barite, Cinnabar, Cassiterite

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8
Q

Minerals with a trapezohedra form (3)

A

Garnet, Leucite, Analcime

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9
Q

Difference between microcline and plagioclase feldspars

A

Microcline has worms, while plagioclase has striations

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10
Q

Minerals with a grey streak (2)

A

Graphite and Stibnite

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11
Q

Minerals with a black streak (4)

A

Pyrite, Magnetite, Pyrolusite, Ilmenite

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12
Q

Minerals with a red-brown streak (2)

A

Hematite and Cuprite

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13
Q

Minerals with a yellow-brown streak (2)

A

Goethite and Limonite

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14
Q

What streak does galena have?

A

Grey-black

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15
Q

What streak does chalcopyrite have?

A

Greenish black

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16
Q

What streak does cinnabar have?

A

Scarlet red

17
Q

Minerals with a brown streak (2)

A

Chromite and Pentlandite

18
Q

Which mineral has peacock ore?

A

Bornite

19
Q

Which mineral has a rotten egg smell when HCl is applied?

A

Siderite

20
Q

What are the two main forms of Pyrite?

A

Pyritohedron and Cube

21
Q

What mineral has rounded grains and is earthy?

A

Bauxite

22
Q

What mineral has cockscomb?

A

Marcasite

23
Q

What mineral has a smell of garlic?

A

Arsenopyrite

24
Q

What mineral is extremely sparkly?

A

Sphalerite

25
Q

What mineral is great under UV light?

A

Scheelite

26
Q

Minerals that are “sooty” (3)

A

Wad, Pyrolusite, Chalcocite

Geology 211 (6 decks)

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