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The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
Pearre, N. C. and Heyl, A. V. Jr. (1960) Chromite and other mineral deposits in serpentine rocks of the Piedmont Upland of Maryland, Delaware, and Pennsylvania, U. S. Geological Survey Bulletin 1082-K, p. 772 and Pl;ate 41.