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
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
3
Q
Plagioclase feldspar
A
Vitreous White 6/6.5 hardness 2.6-2.7 hardness Euhedral form Perfect cleavage Subconchoidal fracture White streak
4
Q
Orthoclase
A
Vitreous Pink 6 hardness 2.6 density Prismatic form 2 cleavages at 90
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
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
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
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
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
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
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
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
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
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
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
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
17
Q
Fluorite
A
Vitreous Pale Green/yellow Hardness of 4 Density of 3-3.2 Perfect octahedral cleavage Conchoidal or uneven fracture White streak
18
Q
Barites
A
Vitreous Colourless/white Hardness of 3-3.65 Density of 4.3-4.6 2 perfect cleavage Uneven fracture White streak
19
Q
Sphalerite
A
Non-metallic Black/brown Hardness of 3-5.4 Density of 4-4.1 Perfect parallel cleavage Conchoidal fracture Brown red streak
20
Q
Galena
A
Metallic Lead grey Hardness of 2.5 Density of 7 Perfect cubic cleavage Subconchoidal fracture Lead grey streak
21
Q
Halite
A
Vitreous Colourless/white Hardness of 2 Density of 2.2 Perfect cubic cleavage Conchoidal fracture White streak
22
Q
Chalcopyrite
A
Metallic Brass yellow Hardness of 5.4 Density of 4.1-4.2 1 imperfect cleavage Conchoidal fracture Green to black streak
