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minerals > Mineral Properites > Flashcards

Mineral Properites Flashcards

1
Q

Calcite

A 
Vitreous/pearly
Colourless/white
3 hardness
2.7 weight
Rhombohedral form
3 cleavages at 75
Conchoidal fracture
White streak
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2
Q

Gypsum

A 
Vitreous/pearly/Sicky
Grey/yellow 
1.5-2 hardness
2.3 density
Tabular form
1 perfect cleavage
No fracture
White streak
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3
Q

Plagioclase feldspar

A 
Vitreous
White
6/6.5 hardness
2.6-2.7 hardness
Euhedral form
Perfect cleavage
Subconchoidal fracture
White streak
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4
Q

Orthoclase

A 
Vitreous 
Pink
6 hardness
2.6 density
Prismatic form
2 cleavages at 90
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5
Q

Augite

A 
Vitreous/dull
Black to green
5.5 - 6 hardness
3.4 weight
Prismatic form
2 good cleavages at 90
Conchoidal fracture
White/grey streak
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6
Q

Muscovite

A 
Vitreous/pearly 
Colourless
Hardness of 2 - 2.25
Density of 2.7-3.5
Tabular form
1 perfect basal sheet cleavage 
Uneven fracture 
White streak with fractures
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7
Q

Biotite

A 
Vitreous/pearly
Black to green
Hardness of 2.5-3
Density of 2.5-3.5
Tabular form
1 perfect cleavage
Uneven fracture
White streak with broken flakes
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8
Q

Hornblende

A 
Vitreous 
Black to dark green
Hardness of 5-6
Density of 3-3.5
Monoclinic form
2 good cleavages at 60
No fractures
Scratches streak plate
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9
Q

Talc

A 
Pearly
White/grey
Hardness of 1
Density of 2.7-2.8
Monoclinic form
1 good basal cleavage
No fracture
White streak
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10
Q

Chlorite

A 
Vitreous
Dark green
Hardness of 1.5-2.5
Density of 2.65-2.9
1 perfect basal cleavage
No fracture 
Pale green streak
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11
Q

Haematite

A 
Metallic/earthy lustre
Blood red
Hardness of 5.5-6.5
Density of 5.2
Poor cleavage
Subchonchoidal or uneven fracture
Dark red streak
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12
Q

Magnetite

A 
Metallic
Iron black
Hardness of 5.5-6.5
Density of 5.2
No cleavage
Subconchoidal or uneven fracture 
Black streak
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13
Q

Pyrite

A 
Metallic
Pale brass yellow
Hardness of 6-6.5
Density of 5
1 poor cleavage 
Conchoidal or uneven fracture
Green to black streak
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14
Q

Corundum

A 
Vitreous
Blue to pink
Hardness of 9
Density of 3.9-4.1
No cleavage
Conchoidal or uneven fracture
White streak
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15
Q

Apatite

A 
Vitreous
Green to yellow
Hardness of 5 
Density of 3.1-3.2
2 cleavages at 90
Conchoidal or uneven fracture 
White streak
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16
Q

Olivine

A 
Vitreous 
Green (darker with iron)
6-7 hardness
3.2-3.3 weight
Granular form
Poor cleavage
Conchoidal fracture
White streak

minerals (4 decks)

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