Manganhumite, a manganese silicate hydroxide mineral of the manganese-humite group, was reported from Franklin by Dunn (1985a). It is massive, medium brown, and has no discernible fluorescence in ultraviolet. It occurs in 10 cm masses associated with abundant franklinite and zincite, the latter with much hetaerolite exsolution and traces of manganosite exsolution. Minor associated minerals are alleghanyite and calcite; willemite is absent. (Dunn, 1995)

 Location Found: Franklin
 Year Discovered: 1969
 Formula: (Mn2+,Mg)7(SiO4)3(OH)2
 Essential Elements: Hydrogen, Manganese, Oxygen, Silicon
 All Elements in Formula: Hydrogen, Magnesium, Manganese, Oxygen, Silicon
 IMA Status: Approved 1969
 To find out more about this mineral at minDat's website, follow this link   Manganhumite

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.349

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 27, No. 1 - Spring 1986, pg. 8Mineral Notes Research Reports, Manganhumite
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