PLM Fundamentals:
Mineral Habit
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What is Mineral Habit? |
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The HABIT of a grain is the general shape that it displays.
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What Are Some Common Mineral Habits That Can Be Seen Under The Microscope? |
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PRISMATIC A regular, roughly rectangular form
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RHOMBIC
A regular form like a pushed-over square (rhombus)
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| FIBROUS
- Straight
A long, very thin, linear form
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FIBROUS
- Wavy
A long, very thin form with waves and bends
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| IRREGULAR
A form with no definite shape
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How to Determine Habit on a Polarized Light Microscope |
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Habit is the description of the external form of a mineral grain. Accordingly, any microscope setting that clearly shows the outlines of the grains can be used to determine habit. |
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How would you describe the habit of grains in the examples below? |
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To see how your description compares to the instructor's...
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