Lab 2 Identifying Minerals Flashcards
1
Q
Quartz
A
- Waxy, Glassy
- Harder than a nail
- No planes of cleavage
- Clear, colourless, light colour
- HEXAGONAL PRISM AND PYRAMID
2
Q
K-felspar
A
- Glassy
- Harder than a nail
- 2 planes of cleavage at 90
- PERTHITIC VEINING
3
Q
Plagioclase
A
- Dull, glassy
- Harder than a nail
- 2 planes of cleavage at 90
- STRIATIONS
- PLAY OF COLOURS
4
Q
Muscovite
A
- Pearly
- Colourless/white
- THIN FLAKY SHEETS
- 1 PLANE OF CLEAVAGE
5
Q
Olivine
A
- Dull, Earthy
- GRANULAR AGGREGATE
- PIECES FALL OFF WHEN SCRATCHING
- GREEN
6
Q
Garnet
A
- Glassy
- Harder than a nail
- No cleavage
- DODECAHEDRON
- DARK RED/GREY
- Massive aggregate
7
Q
Talc
A
- Dull, greasy
- SOFTER THAN A FINGERNAIL
- SOAPY FEEL
8
Q
Gypsum
A
- DULL AND GLASSY
- White colourless
- MONOCLINIC
- SCRATCH WITH A FINGERNAIL
9
Q
Calcite
A
- Glassy
- Scratch with a penny
- 3 planes not at 90
- ROMBEHEDRON
- DOUBLE REFRACTION
10
Q
Halite
A
- Dull
- Colourless
- SALTY
11
Q
Galena
A
- Metallic
- Shiny grey
- Scratch with a nail
- CUBIC
12
Q
Sphalerite
A
- Glassy
- Scratch with a nail
- 6 DIRECTION CLEAVAGE
- PALE YELLOW/LIGHT BROWN STREAK
13
Q
Magnitite
A
- Metallic
- Harder than a nail
- STRONGLY MAGNETIC
14
Q
Hematite
A
- Earthy, dull metallic
- RED BROWN STREAK
- SLIGHTLY MAGNETIC
- Granular aggregate
15
Q
Biotite
A
- Glassy
- BROWN TO BLACK
- THIN FLAKY SHEETS
- 1 plane of cleavage
