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Dravite
last edited: 12/28/15 number of photos: 3
Dravite is brown tourmaline.
chemical composition: NaMg3Al6(BO3)3Si6O18(OH)4
photos
dravite crystals:
1
2
3
Photos are copyright free for
non-commercial educational uses.
Just credit photos to R.Weller/Cochise College.
copyright 2015-R.Weller
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