IDENTIFICATION OF MINERALS IN A ROCK THIN SECTION
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Min |
Observe in plain polarised light |
Observe in crossed polars |
Name |
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% in spec |
Size |
Shape |
Colour |
Pleo. |
Cleav. |
Relief |
Biref. |
Twin. |
Ext. Angle |
Zoning |
Strain |
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1 |
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2 |
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3 |
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4 |
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5 |
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6 |
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Legend: Pleo. – Pleochroism – Changes colour in PPL. Cleav. – Cleavage – break along regular plane.
Biref. – Birefringence – interference colours in x-polars. Twin. – Twinning
Copyright Paul Richards 2003
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