Clintonite, a calcium magnesium aluminosilicate hydroxide mineral, is in the brittle-mica group and is related to margarite. It is found only rarely in the local parts of the Franklin Marble, but more abundantly in the northern extent of the formation in New York. It was reported from Franklin by Struwe (1957) as occurring as 3 mm brown crystals with a bronzy luster, resembling phlogopite, and associated with norbergite, pargasite, spinel, and graphite. It has not been seen by [Dunn]. (Dunn, 1995)

 Location Found: Franklin
 Mineral Note:
 Year Discovered: 1828
 Formula: Ca(Mg,Al)3(Al3SiO10)(OH)2
 Essential Elements: Aluminum, Calcium, Hydrogen, Magnesium, Oxygen, Silicon
 All Elements in Formula: Aluminum, Calcium, Hydrogen, Magnesium, Oxygen, Silicon
 IMA Status: Approved
 To find out more about this mineral at minDat's website, follow this link   Clintonite

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.469

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 36, No. 1 - Spring 1995, pg. 10Closest-Packing and Hydrogen Bonds in Minerals of the Franklin Marble, Paul B. Moore - Clintonite
View IssueV. 30, No, 2 - Fall 1989, pg. 3Notes from the Laboratory & Changes to the List of Species From Franklin and Sterling Hill, Pete J. Dunn, John L. Baum, Clintonite
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