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Ametrine

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Name:Combination of "amethyst" and "citrine".
A variety of Quartz


Ametrine slab

Ametrine crystals are made of alternating sectors of purple and yellow to orange color. Slabs cut perpendicular to the c axis of the crystal look a bit like a pinwheel. The purple sectors are situated under the positive rhombohedral faces (r), and the yellow sectors under the negative rhombohedral faces (z).


While the purple sectors are made of amethyst, the yellow or orange sectors are not made of citrine, because they are colored by inclusions of iron compounds and would more properly called ferruginous quartz. Accordingly, upon heating ametrine the purple sectors pale, while the yellow-orange sectors keep their color.





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Classification of Ametrine

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Other Names for Ametrine

Synonyms:
Bolivianite
Other Languages:
Spanish:Bolivianita

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 Ametrine

Reference List:

- +
Balitskii, V. S. & Balitskaya, O. V. (1986): The amethyst-citrine dichromatism in quartz and its origin. Physics and Chemistry of Minerals 13, 415-421.

Vasconcelos P, Wenk HR, Rossman GR (1994) The Anahí ametrine mine,
Bolivia. Gems and Gemology 30, 4-23.

Balitsky VS, Lu T, Rossman GR, Makhina IB, Mar'in, AA, Shigley JE, Elen S,
Dorogovin BA (1999) Russian synthetic ametrine. Gems and Gemology 35,
122-134.

Balitsky, V. S.; Machina, I. B.; Mar'in, A. A.; Shigley, J. E.; Rossman, G. R.; Lu, T. (2000): Industrial growth, morphology and some properties of Bi-colored amethyst-citrine quartz (ametrine). Journal of Crystal Growth 212, 255-260.

Internet Links for Ametrine

Search Engines:
  • Look for Ametrine on Google
  • Look for Ametrine images on Google
  • Mineral Dealers:
  • Buy minerals from YourMineralCollection
  • Search for Ametrine on Well-Arranged Molecules
  • Lapis Mineral Magazin
  • Find Ametrine on www.crystalclassics.co.uk
  • Buy RARE Minerals from Rocks of Africa
  • Wilensky Fine Minerals
  • Fabre Minerals - search for Ametrine specimens
  • Fine and rare minerals from mintreasure.com
  • Buy rare minerals from Excalibur Minerals
  • Buy from McDougall Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • High-end worldwide specimens & outstanding customer service
  • Specimens:The following Ametrine specimens are currently listed for sale on minfind.com.

    Localities for Ametrine

    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.
    Bolivia
     
    • Santa Cruz Department
      • Sandoval Province
        • La Gaiba District
    http://minerals.gps.caltech.edu/AMETRINE/Index.htm.
    Brazil
     
    www.minerals.net/mineral/silicate/tecto/quartz/images/quartz/gifs/amthyst8.htm.
    Canada
     
    • Ontario
      • Thunder Bay District
        • McTavish Township
    Ontario Gem Company
    India
     
    • Andhra Pradesh
    http://minerals.gps.caltech.edu/AMETRINE/Index.htm.
    Mozambique
     
    • Zambezia Province
      • Alto Ligonha District
    Geotrade Bohemia
    South Africa
     
    • Mpumalanga Province
      • Nkangala District
        • Mkobola
    (Error for yellow iron-stained amethyst; not true ametrine.)
    USA
     
    • Nevada
      • Washoe Co.
        • Hallelujah Junction area
          • Petersen Mountain (Hallelujah Junction [sic])
    Rocks & Minerals 82:415-418
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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