Glaucochroite





 Location Found: Franklin (Type Locality)
     
 
 Year Discovered: 1899
     
 Formula: CaMn2+SiO4
 Essential Elements: Calcium, Manganese, Oxygen, Silicon
 All Elements in Formula: Calcium, Manganese, Oxygen, Silicon
     
 IMA Status: Valid - first described prior to 1959 (pre-IMA) - "Grandfathered" 1975
     
     
 To find out more about this mineral at minDat's website, follow this link   Glaucochroite

     
 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.342

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.58


The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 31, No. 2 - Fall 1990, pg. 18Research Reports Glaucochroite
View IssueV. 9, No. 1 - February 1968, pg. 13The Exclusive Minerals of Franklin/Ogdensburg, N.J. (as of January 1968) by Frank Z. Edwards - Glaucochroite
     
Images

     
Glaucochroite, calcite, hardystonite and green willemite Franklin Mine, Franklin, NJ.Glaucochroite, calcite, hardystonite and green willemite Franklin Mine, Franklin, NJ. under shortwave UV Light
Glaucochroite (dark gray to gray-brown), calcite, hardystonite and green willemite Franklin Mine, Franklin, NJ. Photo by WP.
Glaucochroite (dark gray to gray-brown), calcite, hardystonite and green willemite Franklin Mine, Franklin, NJ under shortwave UV light. The willemite fluoresces green, hardystonite purple and the calcite red-orange, glaucochroite is non-fluorescent. Photo by WP.







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