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Turquoise from
Umba River (Umba Valley), Korogwe Rural District, Tanga Region, Tanzania


Locality type:River
Classification
Species:Turquoise
Formula:CuAl6(PO4)4(OH)8 · 4H2O
Comments:Veins of turquoise with a waxy lustre, up to one centimetre in thickness, are embedded in the sediments. The colour of the material varies from yellowish-green to bluish-green. Good quality turquoise was not found, except for minor quantities.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Turquoise data
Locality Data:Click here to view Umba River (Umba Valley), Korogwe Rural District, Tanga Region, Tanzania
Data Identifiers
Mindat Occurrence Record ID:1252901
Long-form Identifier:1:3:1252901:2
GUID (UUID V4):0
References
Zwaan, P.C. (1974) Garnet, corundum and other gem minerals from Umba, Tanzania. Scripta Geol., 20, 1-41. https://www.repository.naturalis.nl/document/148690
Gübelin, E., Wolgensinger, M. (1976) Edelstenen. Uitgeverij Artis, Brussel (in Dutch).
 
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