CELSIAN



Celsian, a barium aluminum silicate mineral of the feldspar group, was first reported by Frondel et al. (1966) as a rare mineral from the Franklin orebody associated with andradite and mica; it has not been reported from Sterling Hill. Frondel (1972) reported it as bluish white, altering and becoming almost chalky. One specimen, verified by [Dunn] on the basis of XRD data, consists of white, opaque, anhedral, 1 cm crystals, associated with andradite, grossular, and unanalyzed mica. (Dunn, 1995)

 Location Found: Franklin
     
 
 Year Discovered: 1895
     
 Formula: BaAl2Si2O8
 Essential Elements: Aluminum, Barium, Oxygen, Silicon
 All Elements in Formula: Aluminum, Barium, 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   Celsian

     
 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.509

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.48
The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 9, No. 2 - August 1968, pg. 10Mineralogical Data - Celsian
     
Images
     
Celsian, margarosanite, calcite, andradite garnet, feldspar, and willemite, from Franklin, NJCelsian, margarosanite, calcite, andradite garnet, feldspar, and willemite, from Franklin, NJ under shortwave UV Light
Celsian (light blue), margarosanite, andradite garnet (dark brown), hendricksite mica, feldspar, and willemite, from Franklin, NJ. From the collection of, and photo by Robert A. Boymistruk.
Celsian, margarosanite, calcite, andradite garnet, hendricksite mica, feldspar, and willemite, from Franklin, NJ under shortwave UV light. The willemite fluoresces green, margarosanite blue, calcite red, feldspar dark red. The celsian, garnet and hendricksite mica are non-fluorescent. From the collection of, and photo by Robert A. Boymistruk.






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