Andradite





 Location Found: Franklin and Ogdensburg
     
 
 Year Discovered: 1868
     
 Formula: Ca3Fe23+(SiO4)3
 Essential Elements: Calcium, Iron, Oxygen, Silicon
 All Elements in Formula: Calcium, Iron, Oxygen, Silicon
     
 IMA Status: Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
     
     
 To find out more about this mineral at minDat's website, follow this link   Andradite

     
 References:
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.357

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.41


The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 30, No. 1 - Spring 1989, pg. 8The Epidote-Pyroxene-Fluorapophyllite Assemblage in the Franklin Mine at Franklin, New Jersey, Philip P. Betancourt, Andradite (small description)
     
Images

     
Andradite, franklinite, grape willemite and calcite, from the Buckwheat Dump, Franklin NJ.Andradite, franklinite, grape willemite and calcite, from the Buckwheat Dump, Franklin NJ. under shortwave UV Light
Andradite (yellow-brown to gemmy brown), franklinite (black), grape willemite (red-violet) and calcite (white), from the Buckwheat Dump, Franklin NJ. Photo by WP.
Andradite, franklinite, grape willemite and calcite, from the Buckwheat Dump, Franklin NJ under shortwave UV light. The calcite fluoresces red-orange and the willemite green, andradite and franklinite are non-fluorescent. Photo by WP.


Andradite garnet crystals, calcite and franklinite from Franklin, NJ
Andradite garnet crystals (reddish brown to brown), calcite (gray-blue) and franklinite (black) from Franklin, NJ. From the collection of, and photo by Robert A. Boymistruk.


Garnet crystals from Ball's Hill, Franklin, NJ.
Garnet crystals from Ball's Hill, Franklin, NJ. 2" x 1 1/8". From the collection of, and photo by Robert A. Boymistruk.







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