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Staurolite : (Fe2+,Mg,Zn)1.5-2Al9(SiO4)4O6(OH,O)2

Copyright © Rui Nunes 2008
 
 
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Staurolite : (Fe2+,Mg,Zn)1.5-2Al9(SiO4)4O6(OH,O)2

Copyright © Rui Nunes 2008  - This image is copyrighted. Unauthorized reproduction prohibited.

Staurolite "Cruz de Santo André" interpenetration twin 40 mm.
Rui Nunes specimen and photo.
March 2008.

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Photo added: 4th Mar 2008