Thomsonite-Ca





 Location Found: Franklin and Ogdensburg
     
 
 Year Discovered: 1820
     
 Formula: NaCa2[Al5Si5O20] · 6H2O
 Essential Elements: Aluminum, Calcium, Hydrogen, Oxygen, Silicon, Sodium
 All Elements in Formula: Aluminum, Calcium, Hydrogen, Oxygen, Silicon, Sodium
     
 IMA Status: Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
     
Fluorescent Mineral Properties

 Shortwave UV light: Weak pale yellow, very rare
     
 To find out more about this mineral at minDat's website, follow this link   Thomsonite-Ca

     
 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.515. 'Thomsonite'

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.79


The Picking Table References
 PT Issue and PageDescription / Comment
V. 58, No. 1 - Spring 2017, pg. 19Fluorescent Minerals of Franklin and Sterling Hill, N.J., Part 2, Richard C. Bostwick - Thomsonite
View IssueV. 33, No. 2 - Fall 1992, pg. 11The Check List of Franklin-Sterling Hill Fluorescent Minerals - Thomsonite (Fluorescent Info)
View IssueV. 18, No. 2 - September 1977, pg. 19The Fluorescent Minerals of Franklin and Sterling Hill, NJ by Richard C. Bostwick - Thomsonite
View IssueV. 13, No. 2 - August 1972, pg. 13The Fluorescent Minerals of Franklin/Ogdensburg Area by Frank Z. Edwards - Thomsonite - variety calciothomsonite (Fluorescent Info)
     
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