Now that you have learned about some of the physcial properties that can be used to identify minerals, you will identify some minerals on your own. Identify each of the minerals below, identifying the mineral by name in Worksheet 3C in your lab manual. Some physical property descriptions are provided to help you identify the minerals.
After you have identified all of the minerals below, complete Assessment 3C in Canvas
Mineral 1 |
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Property |
Description |
Color and luster |
See photographs above |
Hardness |
Ranges from being barely harder than a finger nail to harder than a copper penny, |
Streak |
White |
Cleavage |
See photographs above |
Acid Reaction? |
Does not react to acid |
Magnetic? |
Not magnetic |
Mineral 2 |
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  |
|
Property |
Description |
Color and luster |
See photograph above |
Hardness |
Harder than (or equal to) a streak plate |
Streak |
White |
Cleavage |
See photographs above |
Acid Reaction? |
Does not react to acid |
Magnetic? |
Not magnetic |
Mineral 3 |
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 |
|
Property |
Description |
Color and luster |
See photograph above |
Hardness |
Harder than a steel nail, but not harder than a streak plate |
Streak |
White |
Cleavage |
See photograph above. Hint: this mineral has two directions of cleavage. |
Acid Reaction? |
Does not react to acid |
Magnetic? |
Not magnetic |
Other |
May display wavy lines |
Mineral 4 |
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 |
|
Property |
Description |
Color and luster |
See photograph above |
Hardness |
Harder than a steel nail, but not harder than a streak plate |
Streak |
White |
Cleavage |
See photograph above. Hint: this mineral has two directions of cleavage. |
Acid Reaction? |
Does not react to acid |
Magnetic? |
Not magnetic |
Other |
Twinning striations |
Mineral 5 |
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   |
|
Property |
Description |
Color and luster |
See photograph above |
Hardness |
Harder than or equal to a finger nail |
Streak |
 |
Cleavage |
See photographs above |
Acid Reaction? |
Does not react to acid |
Magnetic? |
Not magnetic |
Other |
High specific gravity |
Mineral 6 |
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  |
|
Property |
Description |
Color and luster |
See photograph above |
Hardness |
Harder than a steel nail, but not harder than a streak plate |
Streak |
 |
Cleavage |
See photographs above |
Acid Reaction? |
Does not react to acid |
Magnetic? |
Yes |
Mineral 7 |
|
 |
|
Property |
Description |
Color and luster |
See photograph above |
Hardness |
Harder than a finger nail but not harder than a copper penny |
Streak |
White to gray |
Cleavage |
See photograph above |
Acid Reaction? |
Yes |
Magnetic? |
Not magnetic |
Mineral 8 |
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   |
|
Property |
Description |
Color and luster |
See photograph above |
Hardness |
Softer than (or equal to) a finger nail |
Streak |
White |
Cleavage |
See photographs above. Hint: this mineral has one primary direction and one less defined direction of cleavage. |
Acid Reaction? |
Does not react to acid |
Magnetic? |
Not magnetic |