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Dravite from
Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland

Mineral Species
Species:Dravite
Formula:Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Description
Comments:Dark brown crystals contain up to 30% of an uvite component; green crystals contain up to 5 wt% of Cr2O3 (Raber, 2011).
Quality of samples:not specified / average specimens
Confirmation
Validity:Believed Valid
References
References:Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 415-416; Raber, T. (2011): Chromhaltige Turmaline aus dem Lengenbach. Schweizer Strahler 45 (4), 2-5.
Associated Minerals Based on Photo Data:
Dufrénoysite1 photo of Dravite associated with Dufrénoysite at this locality.
Phlogopite1 photo of Dravite associated with Phlogopite at this locality.
Data
Mineral Data:Click here to view Dravite data
Locality Data:Click here to view Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland
Nearest other occurrences of Dravite
2.1km (1.3 miles) A Turtschi, Giessen, Binn Valley, Wallis (Valais), Switzerland
6.3km (3.9 miles) B Albrun pass, Albrunhorn - Turbhorn area, Binn Valley, Wallis (Valais), Switzerland
31.4km (19.5 miles) C I Mondei (Ca' Mondei), Montescheno, Antrona Valley, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy
31.9km (19.8 miles) D Pizzo Marcio North dyke, Pizzo Marcio, Trontano, Vigezzo Valley, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy
43.3km (26.9 miles) E Sponda Alp - Pizzo Forno, Chironico Valley, Leventina, Ticino (Tessin), Switzerland
61.0km (37.9 miles) F Monte Falò, Coiromonte, Armeno, Novara Province, Piedmont, Italy
85.4km (53.1 miles) G Varenche Mine, Saint-Barthélemy, Nus, Aosta Valley, Italy
86.5km (53.7 miles) H Isola Quarry (Isola Quarries), Isola, Madesimo, Spluga Valley (San Giacomo Valley), Valchiavenna, Sondrio Province, Lombardy, Italy
92.2km (57.3 miles) I Sommafiume pegmatitic dyke (Alpe Sommafiume; Marategno Mine), Dervio, Lecco Province, Lombardy, Italy
129.5km (80.5 miles) J Lower Scerscen Glacier, Scerscen Valley, Lanzada, Lanterna Valley, Malenco Valley, Valtellina, Sondrio Province, Lombardy, Italy
Mineral and/or Locality  
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