Chloritoid, an iron aluminum silicate mineral, is rare at Franklin. It was described by Tony Nikischer in The Picking Table, 36, #2, p. 11 (1995), as grayish green to dark-green foliated radiating platy crystals, in a mass 2 cm wide with garnet, perhaps andradite, although almandine is very possible. It was found on the Buckwheat Dump. It was verified using X-ray diffraction and a microprobe analysis which showed Fe, Al, and Si as major elements. (Dunn, 1995)

 Location Found: Franklin
 Formula: (Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
 Essential Elements: Aluminum, Hydrogen, Iron, Oxygen, Silicon
 All Elements in Formula: Aluminum, Hydrogen, Iron, Magnesium, Manganese, Oxygen, Silicon
 IMA Status: Approved
 To find out more about this mineral at minDat's website, follow this link   Chloritoid

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.363

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