Ignoring color, what is the best method to distinguish between potassium feldspar and plagioclase feldspar?

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18-08-2017
Biology

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Ignoring color, what is the best method to distinguish between potassium feldspar and plagioclase feldspar?

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Erudite1 Erudite1 · Answer 1 · 2017-08-25T15:35:38+02:00

Erudite1 Erudite1

25-08-2017

Apart from colour, potassium feldspar and plagioclase feldspar are different in form of striation. Thus, the best method to differentiate between them apart from colour is STRIATION.
Both compounds display two cleavages but only plagioclase have tiny grooves on one cleavage which is called striation.

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