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Williamsite

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Formula:
Mg3(Si2O5)(OH)4
Name:
Named by Charles Upham Shepard in 1848 in honor of its discoverer, Lewis White Williams [December 20, 1804 Goshen, Pennsylvania - September 19, 1873], a mineralogist and geologist of West Chester, Chester County, Pennsylvania. Williams was on the 1857 "Camel Expedition" with Lieutenant Ned Beale.
A variety of Antigorite

A translucent pale apple-green variety of antigorite.

Visit gemdat.org for gemological information about Williamsite.


Classification of Williamsite

Chemical Properties of Williamsite

Formula:
Mg3(Si2O5)(OH)4
Elements listed in formula:

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.

Internet Links for Williamsite

mindat.org URL:
https://www.mindat.org/min-27232.html
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Localities for Williamsite

This 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.
USA
 
  • Maryland
    • Baltimore Co.
      • Bare Hills
Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland, 27p.
    • Harford Co.
      • Cardiff
Minerals of Maryland (1940) Charles Ostrander and Walter E. Price, Jr., Natural History Society of Maryland. p. 56
Pearre, N. & A. V. Heyl (1960) Mineral deposits in serpentine rocks of the Piedmont Upland, Maryland, Pennsylvania and Delaware: U. S. Geological Survey: Bulletin 1082K: 765-766.
Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
  • Pennsylvania
    • Lancaster Co.
      • State Line Chromite District
        • Fulton Township
http://www.mindat.org/forum.php?read,11,54067,54302
Samuel G. Gordon (1922) The Mineralogy of Pennsylvania. Pg. 204. Dana 6:1069. Ref2) American Republican, Jan. 2nd 1849 (Chester Co., Newspaper)
        • Little Britain Township
          • Texas
Samuel G. Gordon (1922) The Mineralogy of Pennsylvania. Pg. 204. Dana 6:1069.
Mineral and/or Locality  
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