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Eesc1150 geology > Minerals > Flashcards

Minerals Flashcards

1
Q

Structure of olivine

A

(Mg, Fe)2 SiO4

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2
Q

Magnetism

A

Most minerals not magnetic except magnetite

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3
Q

What is specific gravity

A

Expression of density in relation to density of a standard or reference

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4
Q

Cleavage

A

Tendency to break along planes of weaknesses inherited from their crystal

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5
Q

Cleavage degree

A

Perfect, good, bad + number of cleavage directions

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6
Q

Fracture

A

Nature of the surface formed when a mineral is broken along a direction other than the cleavage

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7
Q

Conchoidal fracture

A

Curved like broken glass or shells

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8
Q

Hackly fracture

A

Like broken iron

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9
Q

Gypsum cleavage

A

1 perfect and 2 distinct cleavages ( none at 90)

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10
Q

Calcite cleavage

A

3 cleavages at 60

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11
Q

Feldspar cleavage

A

2 distinct cleavages at 90

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12
Q

Magnetite cleavages

A

Uneven fracture

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13
Q

Native copper

A

Hackly fracture

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14
Q

Opal

A

Conchoidal fracture

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15
Q

Quartz fracture

A

Conchoidal fracture

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16
Q

Lustre

A

Light reflection off the surface of a mineral

17
Q

Lustre types

A

Metallic
Vitreous (glassy)
Pearly
Greasy
Silky
Adamantine (diamond)
Dull

18
Q

Tourmaline cross section colour

A

Orange brown

19
Q

Orthopyroxene Cross section colour

A

Pink

20
Q

Hornblende cross section colour

A

Green

21
Q

Biotite cross section colour

A

Brown

22
Q

Pyrite lustre

A

Metallic

23
Q

Calcite lustre

A

Vitreous

24
Q

Diamond lustre

A

Adamantine

25
Q

Muscovite lustre

A

Pearly

26
Q

Kaolinite lustre

A

Dull

27
Q

Chalk characteristic

A

White
Light
Moh 3
CaCO3

28
Q

Ilmenite characteristic

A

4.7 gravity(heavy)
Moh 6
Black mineral
Submetallic lustre

29
Q

Quartz characteristic

A

SiO4
Hard
Composed of silica
Colourless streak

30
Q

Actinolite

A

Eesc1150 geology (6 decks)

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