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Question description

Assignment: Mineral Identification Investigation

30

Mineral Identification Data Table

Sample Number

Color

Cleavage or Fracture

Luster

25

26

27

13

7

23

Analysis

Sample 7:  _________________________

Sample 13:  _______________________

Sample 23:  _______________________

Sample 25:  _______________________

Sample 26:  ______________________

Sample 27:  ______________________

Questions

1.  Which mineral above would be the most difficult to scratch?

2.  Give two examples of minerals that have a property in common.

3.  Could you have identified any of the minerals after having described only a few, rather than all, of the properties you tested? If so, give an example.

4.  Why is it still a good idea to test more properties than might be necessary?

Mineral Identification Key

Mineral Identification Key

Mineral Name

Color

Streak

Cleavage or Fracture

Hardness

Luster

Special Properties

Hematite

Black or red

Red-brown

Fracture

1–6.5

Metallic

Magnetic

Galena

Lead-gray

Gray-black

Cleavage

2.5–3

Metallic

Heavy

Sulfur

Pale yellow

Pale yellow

Fracture

1.5–2.5

Nonmetallic

Rotten-egg odor

Calcite

Usually white, but can be any color

White

Cleavage

3

Nonmetallic

Fizzes in acids

Quartz

Clear, white, rose, violet, black

White

Fracture

7

Nonmetallic

None

Mica

Black, clear, brown, green, yellow

Yellow

Cleavage

2.5

Nonmetallic

None

Analysis

Sample 7:  _______________________

Sample 13:  ______________________

Sample 23:  ______________________

Sample 25:  -_____________________

Sample 26:  ______________________

Sample 27: ______________________


Tutor Answer

(Top Tutor) Daniel C.
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School: UT Austin
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