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Dravite-Schorl Series

Big Photo

Portugal 2 Quarry (Granitos Iberolusos Quarry), Malpartida, Almeida, Guarda District, Portugal
© Martins da Pedra

Show Dravite-Schorl Series Photos (11)
System:Trigonal
Series Formula:
[Na][Mg
 
3
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
-
[Na][Fe
2+
3
][Al
 
6
][(OH)
 
3
|OH|(BO
 
3
)
 
3
|Si
 
6
O
 
18
]
A series between Dravite and Schorl

The large majority of blackish to dark brownish tourmalines belong to this series.

Classification of Dravite-Schorl Series

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Crystallography of Dravite-Schorl Series

Crystal System:Trigonal

Other Names for Dravite-Schorl Series

Synonyms:
Schorl-Dravite Series
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Dravite-Schorl Series

Reference List:Povondra, P. (1981) The crystal chemistry of tourmalines of the schorl-dravite series. Acta Universitatis Carolinae Geologica 3: 223-264.

Povondra, P. and Cech, F. (1985) Lattice parameters of tourmalines of the dravite-schorl series and their relation to chemical composition. Acta Universitatis Carolinae Geologica 1985 (3): 235-245.

Bloodaxe, E.S., J.M. Hughes, M.D. Dyar, E.S. Grew, and C.V. Guidotti (1999), Linking structure and chemistry in the schorl-dravite series: American Mineralogist: 84: 922-928.

Internet Links for Dravite-Schorl Series

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    Localities for Dravite-Schorl Series

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Greece
     
    • Crete (Kriti) Department
      • Crete (Kriti) Island
        • Lasithi Prefecture
          • Sitía
    		Eur. J. Mineral. , 1992, 4, pp. 487-507.
    • Macedonia Department
      • Thessaloníki (Salonica) Prefecture
        • Polydentri - Kolchiko area
          • Vertiskos Mt
    		K. Michailidis et al. , Eur. J. Mineral. , 1996, 8, pp. 393-404.
    India
     
    • Karnataka
      • Hutti-Maski belt
        • Raichur District
    		Krienitz, M. et al. (2008): Hydrothermal gold mineralization at the Hira Buddini gold mine, India: constraints on fluid evolution and fluid sources from boron isotopic compositions of tourmaline. Mineralium Deposita, 43, 421-434.
    • Rajasthan (Rajputana)
      • Udaipur Division
        • Sirohi District
    		Deb, M., Tiwary, A., and Palmer, M.R. (1997): Mineralium Deposita 32, 94-99.
    Italy
     
    • Tuscany
      • Lucca Province
        • Apuan Alps
          • Stazzema
    		Eur. J. Mineral. , 1991, 3, pp. 537-548.
    Madagascar
     
    • Antananarivo Province
      • Vakinankaratra Region (Betafo - Antsirabé region)
        • Betafo District
          • Ambohimanambola Commune
            • Mount Ikaka
              • Anjanabonoina pegmatites
    		De Vito et al (2006): Nb-Ti-Ta oxides in the gem-mineralized and "hybrid" Anjanabonoina granitic pegmatite, central Madagascar: A record of magmatic and postmagmatic events. Canadian Mineralogist. 44: 87-103.
    Norway
     
    • Aust-Agder
      • Risør
    		Van King
    Switzerland
     
    • Ticino (Tessin)
      • Blenio Valley
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): \"Mineralienlexikon der Schweiz\", Wepf (Basel), p. 415.
      • Leventina
        • Faido
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): \"Mineralienlexikon der Schweiz\", Wepf (Basel), p. 415.
      • Lugano lake
        • Carona
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): \"Mineralienlexikon der Schweiz\", Wepf (Basel), p. 416.
    • Wallis (Valais)
      • Binn Valley
        • Kriegalp Valley (Chriegalp Valley)
    Thailand
     
    • Pathum Thani Province
    		Eur. J. Mineral. , 1993, 5, pp. 721-736.
    USA
     
    • California
      • Riverside Co.
        • Cahuilla District
          • Little Cahuilla Mountain
    		Osborn, P. (2006) Personal communication between Philip Osborn, Hemet CA. (discoverer/owner) and Scott L. Ritchie, SDMC; 07/25.
    • Colorado
      • Jefferson Co.
    		Minerals of Colorado (1997) E.B. Eckels
    Minerals of Colorado (1997) E.B. Eckels
      • Larimer Co.
        • Crystal Mountain Pegmatite District (Storm Mountain District)
    		Minerals of Colorado (1997) E.B. Eckels
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 2nd Nov 2009 15:43:43