Fluor-dravite from
Kokcha Valley, Badakhshan, Afghanistan
Locality type: | Valley | |
Classification | ||
---|---|---|
Species: | Fluor-dravite | |
Formula: | NaMg3Al6(Si6O18)(BO3)3(OH)3F | |
Comments: | Analyses by several different researchers (see discussion of the deep blue "fluor-dravite" composition at https://www.mindat.org/mesg-506047.html ) suggest little F is present in these samples, and so the tourmalines fall along the dravite/oxy-dravite/uvite nomenclature boundaries. Specific references with compositional data include: https://www.gia.edu/doc/Gems-Gemology-Winter-2016v4.pdf and https://www.rockptx.com/fkm-251-to-fkm-275/#FKM-268 . | |
Confirmation | ||
Validity: | Unconfirmed/Questioned | |
Data | ||
Mineral Data: | Click here to view Fluor-dravite data | |
Locality Data: | Click here to view Kokcha Valley, Badakhshan, Afghanistan | |
Data Identifiers | ||
Mindat Occurrence Record ID: | 1091453 | |
Long-form Identifier: | 1:3:1091453:5 | |
GUID (UUID V4): | 3c450bbe-7a36-4a2d-8e05-7a53cf6da629 | |
References | ||