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Silicate (16/75)

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DRAVITE TOURMALINE<br />
Brown Variety Best Developed in Pegmatites<br />
Forms in igneous & metamorphic rocks<br />
(Hexagonal,Ditrigonal pyramidal, piezoelectric) metamorphosed limestone matrix NaMg3B3Al3(Al3Si6O27)(OH)4

Fphoto-19538707B-6PSs.jpg

DRAVITE TOURMALINE
Brown Variety Best Developed in Pegmatites
Forms in igneous & metamorphic rocks
(Hexagonal,Ditrigonal pyramidal, piezoelectric) metamorphosed limestone matrix NaMg3B3Al3(Al3Si6O27)(OH)4

Copyright:© 1987 Paul Silverman - Fundamental Photographs

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