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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, 2018 by catherinegracie (170 points)

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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.


answered Jan 10, 2018 by Weasel (58,930 points)
selected Apr 30, 2018 by hershel