Location Found: Franklin (Type Locality) and Ogdensburg, unique to Franklin/Ogdensburg area
 Year Discovered: 1966
 Formula: K(Zn,Mg,Mn2+)3(AlSi3O10)(OH)2
 Essential Elements: Aluminum, Hydrogen, Oxygen, Potassium, Silicon, Zinc
 All Elements in Formula: Aluminum, Hydrogen, Magnesium, Manganese, Oxygen, Potassium, Silicon, Zinc
 IMA Status: Approved
 To find out more about this mineral at minDat's website, follow this link   Hendricksite

Dunn, Pete J. (1995). Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits. Franklin, NJ.: The Franklin-Ogdensburg Mineralogical Society. p.464

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.61

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 9, No. 1 - February 1968, pg. 13The Exclusive Minerals of Franklin/Ogdensburg, N.J. (as of January 1968) by Frank Z. Edwards - Hendricksite (Short Note)
View IssueV. 8, No. 2 - August 1967, pg. 5Mineralogical Data - Hendricksite
View IssueV. 8, No. 1 - February 1967, pg. 8Hendricksite/Manganophyllite

Hendricksite mica and andradite garnet from Franklin, NJ.
Hendricksite mica (dark brown, black) and andradite garnet (brown) from Franklin, NJ. Photo By WP.

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