Mineral ID

Description

Mineral ID Table

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Mineral ID
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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