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Deweylite

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Big Photo

Mineral Hill, Elwyn, Middletown Township, Delaware Co., Pennsylvania, USA
© M.Heintzelman

Show Deweylite Photos (7)



Formula:
Mg
 
4
Si
 
3
O
 
10
 · 6H
 
2
O ?


A mixture of various poorly ordered trioctahedral 1:1 and 2:1 layer silicates, mainly lizardite and stevensite.

Classification of Deweylite

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Chemical Properties of Deweylite

Formula:
Mg
 
4
Si
 
3
O
 
10
 · 6H
 
2
O ?
Essential elements:H, Mg, O, Si
All elements listed in formula:H, Mg, O, Si

Other Names for Deweylite

Synonyms:
DeveiliteGimnitePseudodeweylitePseudogymnite
Other Languages:
German:Deveilit
Deweylit
Gimnit
Pseudodeweylit
Pseudogymnit
Spanish:Deveilita
Deweylita
Gimnita
Pseudodeweylita
Pseudogymnita

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 Deweylite

Reference List:

- +
Clark, 1993, "Hey's Mineral Index"
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)

Internet Links for Deweylite

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    • Localities for Deweylite

    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.
    Hide Locality List
    (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.
    Austria
     
    • Carinthia
      • Hohe Tauern
        • Reißeck group
          • Gmünd
    		M. Puttner: Carinthia II 184./104.:43-47 (1994)
    • Styria
      • Bad Radkersburg
        • Klöch
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
      • Leoben
    		Aufschluss 1972(SB), 80-83
    Czech Republic
     
    • Moravia (Mähren; Maehren)
      • South Moravia Region
        • Letovice (Lettowitz)
    		Ulrych, J.: Stichtit z hadcového tělesa od Slatinky u Letovic. Časopis pro mineralogii a geologii, 1966, roč. 11, č. 3, s. 311-315.
    India
     
    • Andhra Pradesh
      • Kadapa (Cuddapah)
    		Anantha Iyer, G.V. et al (1987) Memoir No. 6, Geological Society of India, 459-469.
    Italy
     
    • Liguria
      • Genova Province
        • Genova
          • Borzoli
    		Giuseppe Pipino - L'antica miniera di Monte Ramazzo e i suoi minerali - Rivista Mineralogica Italiana, Milano, vol. 8, fasc. 3, 1977
      • La Spezia Province
        • Beverino
    		Antofilli, Borgo, Palenzona, 1985. I nostri minerali. Geologia e mineralogia in Liguria. Edizioni Melita, La Spezia
        • Carro
    		Antofilli, Borgo, Palenzona, 1985. I nostri minerali. Geologia e mineralogia in Liguria. Edizioni Melita, La Spezia
    • Trentino-Alto Adige
      • Trento Province
        • Fassa Valley
          • Monzoni Mts
    		Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
    Japan
     
    • Honshu Island
      • Chubu Region
        • Fukui Prefecture
          • Oi-gun
            • Oi-cho-Hongo
    		Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan)
      • Chugoku region
        • Okayama prefecture
          • Niimi City
    Slovakia
     
    • Košice Region
      • Košice Co.
        • Jasov
    		Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    • Prešov Region
      • Prešov Co.
    		Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    USA
     
    • California
      • Inyo Co.
    		Hall, Wayne Everett & E.M. Mackevett (1958), Economic geology of the Darwin quadrangle, Inyo County, California: Calif Division of Mines Special Report 51, 77 pp.: 16; Hall, Wayne Everett & Edward M. Mackevett (1963), Geology and ore deposits of the Darwin quadrangle, Inyo County, California: USGS PP 368: 62; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 167.
      • Napa Co.
        • Mayacmas Mts (Mayacamas Mts)
          • Calistoga District (Silverado District)
            • Calistoga
              • The Palisades [range]
    		Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 167.
      • Riverside Co.
        • Crestmore
          • Crestmore quarries
            • Chino Hill
    		Rogers, Austin Flint (1918b), An American occurrence of periclase and its bearing on the origin and history of calcite brucite rocks: American Journal of Science, 4th. Series: 46: 584; Daly, John W. (1933),Paragenesis of mineral assemblages at Crestmore, California (abstract): …American Mineralogist (1935): 20: 651; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 167.
            • Sky Blue Hill
    		Daly, John W. (1935) Paragenesis of the minerals a Crestmore, Riverside County, California. American Mineralogist: 20: 638-659; Woodford, A.O., Crippen, R.A., and Garner, K.B. (1941) Section Across Commercial Quarry, Crestmorre, California. American Mineralogist: 26: 352-381.
      • San Bernardino Co.
        • Ivanpah District (Copper World District)
          • Clark Mts (Clark Mountain Range)
            • Clark Mountain Sub-District
              • Clark Mountain
    		Schaller, Waldemar Theodore (1935), Monticellite from San Bernardino County, California, and the monticellite series: American Mineralogist: 20: 816; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 167.
      • Santa Clara Co.
        • Diablo Range
          • Red Mountain District
            • Red Mountain
    		Rogers, Austin Flint (1912b), Notes on rare minerals from California: Columbia University, School of Mines Quarterly: 33: 380; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 167.
    • Delaware
      • New Castle Co.
        • Centerville (Centreville)
    		Dana 6: 1070.
    • Maine
      • Knox Co.
        • Thomaston
    		King & Foord, 1994. Mineralogy of Maine, V.1.
    • Maryland
      • Baltimore Co.
        • Blue Mount
    		Rocks & Min.:12:247.
        • Delight
          • Soldiers' Delight ridge
    		Rocks & Min.:11:111; 19:148.
        • Owings Mills
    		Rocks & Min.: 20:473.
      • Montgomery Co.
        • Rockville
    		F. Parker (2005) "The Minerals of the Hunting Hill Quarry, Rockville, Maryland" Mineralogical Record 35:435-446.
    • Nevada
      • Nye Co.
        • Gabbs District
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • White Pine Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
    NBMG Spec. Pub. 31 Minerals of Nevada
    • New Jersey
      • Hudson Co.
        • Hoboken
    		No reference listed
    The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 84.
      • New York City
    		The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 29.
    Observed by David S. Bernstein- February of 2012
    Collected by Steve Okulewicz
      • Westchester Co.
    		The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 83.
    • North Carolina
    		Genth,F.A.,1891,The Minerals Of North Carolina;USGS Bulletion No.74
        • Webster-Balsam
    		Wilson,W.F and McKenzie,B.J,1978, Mineral Collecting Sites in North Carolina ,Information Circular 24
      • Macon Co.
        • Cowee Valley
          • Ellijay District
            • Franklin
              • Corundum Hill
    		Ref.: Dana 6:499, 560 & 1077.
    Genth,F.A.,1891,The Minerals Of North Carolina:USGS Bulletion No.74
    Genth,F.A.,1891,The Minerals Of North Carolina;USGS Bulletion No.74
    • Pennsylvania
      • Berks Co.
        • Cumru Township
    		Ref.: Gordon, Samuel G. (1922), Mineralogy of Pennsylvania: 153.
        • Spring Township
    		Gordon: Mineralogy of Pennsylvania, 1922 p. 159
    Gordon: Mineralogy of Pennysylvania, 1922 p. 159
      • Chester Co.
        • Newlin Township
          • Unionville
    		Mineralogy of Pennsylvania - 1922; Samual S. Gordon, pg. 173
        • State Line Chromite District
          • West Nottingham Township
    		Dana 6: 1067.
    www.libraries.psu.edu/emsl/guides/X/delaware.htm.
        • Middletown Township
          • Elwyn
    		Mineralogy of Pennsylvania-1922; Samuel Gordon, pgs 123-124
    Gordon's Mineralogy of Pennsylvania (1922) p. 191
      • Lancaster Co.
        • State Line Chromite District
          • Fulton Township
    		Lapham & Geyer, 1965. Mineral Collecting in Pennsylvania; American Mineralogist 1965: 50: 1708-1716.
    Personally Collected 4/12/2008, Mark J. Sigouin, Pennsylvania Licenced Professional Geologist
          • Little Britain Township
    		Mineralogy of Pennsylvania-1922; Samuel S. Gordon, pg. 206
            • Texas
    		Lapham & Geyer, 1965. Mineral Collecting in Pennsylvania
      • Philadelphia Co.
        • Lafayette
    		Mineralogy of Pennsylvania-1922; Samuel S. Gordon, pg. 221-222
    • Vermont
      • Windham Co.
        • Newfane
    		Rocks & Min. Vol. 71, (1996)
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