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How do you tell the difference between Augite and Hornblende based purely on observation?

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asked Jan 9 by catherinegracie (140 points)

1 Answer

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Unlike the feldspars or hornblende, pyroxenes show mediocre cleavages that are hard to spot. Augite is most easily confused with hornblendeHornblende has highly reflective cleavages whereas augitecleavages are dull. Hornblende tends to form elongate rectangular crystals whereas augite crystals tend to be blocky. Read more.

http://www.pitt.edu/~cejones/GeoImages/1Minerals/1IgneousMineralz/Pyroxene.html

answered Jan 10 by Weasel (46,610 points)
 


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