Articles | Volume 32, issue 3
Eur. J. Mineral., 32, 355–365, 2020
https://doi.org/10.5194/ejm-32-355-2020
Eur. J. Mineral., 32, 355–365, 2020
https://doi.org/10.5194/ejm-32-355-2020

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 et al.

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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.