• Register


Information for users from the old Q&A site
If you have an account from our old Q&A site, your account was transferred over, but you need to reset your password and confirm your email address.
Reset Password here
Confirm Email here

2,095 questions

3,623 answers

959 comments

15,049 users

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

0 votes
asked Jan 9 by catherinegracie (170 points)

1 Answer

+1 vote
 
Best answer

 

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 (53,090 points)
selected Apr 30 by hershel
 


...