Location Found: Ogdensburg
 Year Discovered: 1827
 Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
 Essential Elements: Hydrogen, Iron, Oxygen, Silicon, Sodium
 All Elements in Formula: Aluminum, Hydrogen, Iron, Oxygen, Silicon, Sodium
 IMA Status: Approved
 To find out more about this mineral at minDat's website, follow this link   Nontronite

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.486

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.70

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 3, No. 2 - July 1962, pg. 10Nontronite - variety of Chloropal (small article)

Nontronite, calcite from Sterling Hill Mine, Ogdensburg, NJ
Nontronite (dark green-gray), calcite (white) from Sterling Hill Mine, Ogdensburg, NJ. Field of view 3/8" (9.5 mm). From the collection of, and photo by WP.

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