Description
Mineral ID Table
Hardness
Colour
Streak
Cleavage / Fracture
Lustre
Other
Mineral Name
1
Light green, grey, white
white
Perfect in one direction
Pearly
Sp gr = 2.7-2.8
Flakes with touch
Talc
1-2
Dark grey, black
Gray-black
Perfect in one direction
Metallic-greasy
Sp gr =2.2
Graphite
2
Colourless, white, grey
white
Perfect in one direction
Pearly, silky
Sp gr = 2.3
Gypsum
2-2.5
Colourless, white, purple, yellow
white
Conchoidal fracture
vitreous
Sp gr = 2.2
Salty taste
Halite
2-2.5
Light brown, colourless
White
Perfect in one direction
Pearly-glassy
Sp gr =2.8-2.9
Thin-peels
Muscovite
2.5
Grey
Grey
Cleavage in 3 directions at 90o
Metallic
Sp gr = 7.4-7.6
Galena
2.5-3
Black, brown
white
Perfect in one direction
Pearly-glassy
Sp gr 2.8-3.2
Thin-peels
Biotite
3
White to pink
white
Cleavage 3 directions at 75o
vitreous
Sp gr =2.7
Acid = fizzes
Calcite
3.5-4
Yellow, brown, black
Yellow-light brown
Perfect in six directions
Metallic, resinous (waxy)
Sp gr = 3.9-4.1
Sphalerite
3.5-4
Brass yellow
Green-black
Poor in one direction
Metallic
Sp gr = 4.1-4.3
Chalcopyrite
3.5-4
Pink, white
White
Three directions not at 90o
Non-metallic
Sp gr = 2.8
Acid = fizzes
Dolomite
4
Colourless, purple, yellow, varies
White
Perfect in 4 directions
Vitreous
Sp gr = 3.2
Fluorite
4-5.5
Yellow, brown
Yellowish brown
Irregular
Earthy
Sp gr = 2.9-4.3
Rust stains
Limonite
5
Green, brown, varies
White
Conchoidal
Vitreous
Sp gr = 3.1
Apatite
5-6
Dark green, black
Grey-white
Cleavage 2 directions at 60o and 120o
vitreous
Sp gr = 3-3.4
Long slender crystals
Hornblende (Amphibole)
5.5-6.5
Reddish brown, grey, black
reddish
irregular
Metallic or earthy
Sp gr = 5.3
Hematite
5.5-6.5
black
black
irregular
metallic
Sp gr = 5.2
Magnetic
Magnetite
6
White-grey
white
Cleavage 2 directions at 90o
vitreous
Sp gr = 2.6
Plagioclase Feldspar
6
Salmon pink to red
white
Cleavage 2 directions at 90o
vitreous
Sp gr = 2.6
Orthoclase Feldspar
6-6.5
Brass yellow
Green-black
Irregular-conchoidal
metallic
Sp gr = 5-5.1
Cubic crystals
Pyrite
7
Colourless, white, varies
white
Conchoidal fracture
vitreous
Sp gr =2.6
Hexagonal crystals
Quartz
Mineral #
Colour
Streak
Cleavage / Fracture
Hardness
Lustre
Other
Mineral Name
After you have made your observations identify the mineral using the Mineral ID Table. it is also above. Instead identify all samples in video
Proceed to the video containing 5 mineral samples by going to this address (copy and paste it into a web browser): https://drive.google.com/file/d/1D1mZ7HhEVpaGlg651e2zcesPQkWoVL0z/view?usp=sharing. You only need to identify 2 out of the 5 samples on the video. So, complete the chart for only two (2) samples. This Assignment will be marked out of 6: 2 for identifying both minerals correctly, 2 for giving supporting observations, 2 for citing the reference you used to confirm the mineral that you identified the sample as (can cite material from our course content).
http://www.galleries.com/minerals/by-name.htm
