European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 32, issue 3
Articles | Volume 32, issue 3
https://doi.org/10.5194/ejm-32-355-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-32-355-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 32, issue 3
Research article
 | 
17 Jun 2020
Research article |  | 17 Jun 2020

Laurentthomasite, Mg2K(Be2Al)Si12O30: a new milarite-group-type member from the Ihorombe region, Fianarantsoa Province, Madagascar

Cristiano Ferraris, Isabella Pignatelli, Fernando Cámara, Giancarlo Parodi, Sylvain Pont, Martin Schreyer, and Fengxia Wei

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Latest update: 13 Oct 2026
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Short summary
Laurentthomasite is a new mineral from Madagascar showing a very strong dichroism going from deep blue to yellow-green colours. The physical and chemical characteristics of this gem quality mineral bring it to the attention of the jewel industry as well as collectors of cut stones.
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