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Usually white, may be ...
From being a water-rich alteration product of sodalite that had replaced nepheline.
A Mixture Of:
The type location is Dennis Hill, Litchfield, Maine, USA. Described by Clarke (1886), but later determined to be a mixture of natrolite, "epinatrolite", "hydrargillite" and gibbsite by Thugutt (1910). Probably dominantly natrolite (~80%). Formed by alteration of nepheline (Norway and Paraguay) or sodalite (Maine).
Compare also Spreustein.

Classification of Hydronephelite URL:
Please feel free to link to this page.

Physical Properties of Hydronephelite

Usually white, may be stained pink to red brown.

Other Information

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

References for Hydronephelite

Reference List:
Clarke, F. (1886): The Minerals of Litchfield, Maine, American Journal of Science, third series, 31, 262-272.

Dana (6th edition), p 609.

Troeger, W.E. (1952): Tabellen zur optischen Bestimmung der gesteinsbildenden Minerale. Schweizerbarth, Stuttgart, Germany, xx pp.

Thugutt, S.J. (1932): Arch. Min. Soc. Sci. Varsovie (Warsaw) 8, 141-143 (in Polish).

Stuetzel (1933): Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, 1, 534 (in German). (abstract of Thugutt's 1932 paper)

Dunham, K.C. (1933): American Mineralogist, 18, 374.

Internet Links for Hydronephelite

Localities for Hydronephelite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
  • Ontario
    • Hastings Co.
      • Dungannon Township
Ann P. Sabina, rock & Mineral Collecting in Canada, Volume 2, Ontario & Quebec, page 78.
Van King
  • Kujalleq
    • Narsaq
Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
  • Guairá Department
Geological Survey Professional Paper 327 (U.S. Department of the Interior, 1959)
  • Hawaii
    • Honolulu Co.
      • Oahu Island
        • Honolulu
Dunham, K.C. (1933): Crystal cavities in lavas from the hawaiian islands, The American Mineralogist, Vol. 18, 369-385.
    • Kauai Co.
      • Kauai Island
Dunham, K.C. (1933) The American Mineralogist, 18, 369-385.
  • Maine
    • Kennebec Co.
      • Litchfield
King, V. and Foord, E., 1994, Mineralogy of Maine, v.1.
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