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Oxy-dravite from
Valletta Mine, Vallone della Valletta, Canosio, Cuneo Province, Piedmont, Italy


Locality type:Mine
Classification
Species:Oxy-dravite
Formula:Na(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
Comments:Deep red Fe3+/Mn3+-bearing tourmaline found in sterile rock with only quartz and hematite as associated minerals. It is a Na-dominant oxy-species belonging to the alkali-subgroup 3 of the tourmaline supergroup and showing intermediate compositions between oxy-dravite and bosiite series (Bosi et al., 2017)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Oxy-dravite data
Locality Data:Click here to view Valletta Mine, Vallone della Valletta, Canosio, Cuneo Province, Piedmont, Italy
Data Identifiers
Mindat Occurrence Record ID:1242535
Long-form Identifier:1:3:1242535:4
GUID (UUID V4):0
References
Bosi, Ferdinando, Cámara, Fernando, Ciriotti, Marco E., Hålenius, Ulf, Reznitskii, Leonid, Stagno, Vincenzo (2017) Crystal-chemical relations and classification problems in tourmalines belonging to the oxy-schorl–oxy-dravite–bosiite–povondraite series. European Journal of Mineralogy, 29 (3) 445-455 doi:10.1127/ejm/2017/0029-2616
 
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