European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 37, issue 4
Articles | Volume 37, issue 4
https://doi.org/10.5194/ejm-37-437-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/ejm-37-437-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 37, issue 4
Research article
 | 
10 Jul 2025
Research article |  | 10 Jul 2025

Fibrous tourmaline from San Piero in Campo (Elba, Italy)

Giovanni B. Andreozzi, Dario Di Giuseppe, Alessandro F. Gualtieri, Valentina Scognamiglio, Laura Fornasini, Danilo Bersani, Tommaso Giovanardi, Federico Lugli, and Federico Pezzotta

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Short summary
An unusual tourmaline was studied using a multi-analytical approach. The sample comes from a granitic pegmatite on the island of Elba and consists of three generations of tourmaline: green prismatic tourmaline, a dark fibrous cap, and colourless acicular single crystals. The most likely scenario for its formation involves the miarolitic cavity fracturing due to mechanical shock, the subsequent circulation of the highly reactive cavity fluids, and the leaching of accessory biotite in the surrounding pegmatite.
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