Esperite





 Location Found: Franklin (Type Locality)
     
 
 Year Discovered: 1928
     
 Formula: PbCa2Zn3(SiO4)3
 Essential Elements: Calcium, Lead, Oxygen, Silicon, Zinc
 All Elements in Formula: Calcium, Lead, Oxygen, Silicon, Zinc
     
 IMA Status: Approved 1964
     
Fluorescent Mineral Properties

 Shortwave UV light: Very bright lemon-yellow
 Mid wave UV light: Weak lemon-yellow
 Longwave UV light: Weak lemon-yellow
 Additional Information: Very weak phosphorescence
     
 To find out more about this mineral at minDat's website, follow this link   Esperite

     
 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.368

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.55


The Picking Table References
 PT Issue and PageDescription / Comment
V. 57, No. 2 - Fall 2016, pg. 17Fluorescent Minerals of Franklin and Sterling Hill, N.J., Part 1, Richard C. Bostwick - Esperite
V. 51, No. 2 - Fall 2010, pg. 7Abstract of the redefinition of Franklin esperite formula and structure.
View IssueV. 45, No. 1 - Spring 2004, pg. 11The Art of Fluorescent Mineral Photography, With Special Attention to the Minerals of Franklin and Sterling Hill Photographing the More Popular Franklin and Sterling Hill Fluorescent Minerals - Esperite
View IssueV. 43, No. 1 - Spring 2002, pg. 29In Praise of Esperite Richard C. Bostwick
View IssueV. 33, No. 2 - Fall 1992, pg. 10The Check List of Franklin-Sterling Hill Fluorescent Minerals - Esperite (Fluorescent Info)
View IssueV. 33, No. 1 - Spring 1992, pg. 19The Lead Silicate Minerals of Franklin, New Jersey: an SEM Survey, Herb Yeates, Esperite
View IssueV. 28, No. 1 - Spring 1987, pg. 23Mineral Notes Research Reports, The Esperite Assemblage
View IssueV. 18, No. 1 - March 1977, pg. 24The Fluorescent Minerals of Franklin and Sterling Hill, NJ by Richard C. Bostwick - Esperite
View IssueV. 13, No. 2 - August 1972, pg. 12The Fluorescent Minerals of Franklin/Ogdensburg Area by Frank Z. Edwards - Esperite (Fluorescent Info)
View IssueV. 9, No. 1 - February 1968, pg. 12The Exclusive Minerals of Franklin/Ogdensburg, N.J. (as of January 1968) by Frank Z. Edwards - Esperite
View IssueV. 6, No. 1 - February 1965, pg. 6Esperite, a Proposed New Name for Calcium-Larsenite
     
Images

     
Esperite, willemite, franklinite and calcozincite from FranklinEsperite, willemite, franklinite and calcozincite from Franklin under shortwave UV Light
Esperite (white), willemite (light green), franklinite (black) and calcozincite (brown) from Franklin, New Jersey. From the collection of, and photo by, JVF.
Esperite, willemite, franklinite and calcozincite from Franklin, New Jersey under shortwave UV light. The esperite fluoresces yellow, and the willemite green. From the collection of, and photo by, JVF.
Esperite, willemite, franklinite and calcozincite from Franklin under longwave UV Light
Esperite, willemite, franklinite and calcozincite from Franklin, New Jersey under longwave UV light. The esperite fluoresces yellow, and the willemite green. From the collection of, and photo by, JVF.


Esperite, calcite, franklinite, hardystonite, zincite and willemite from Franklin, NJEsperite, calcite, franklinite, hardystonite, zincite and willemite from Franklin, NJ under shortwave UV Light
Esperite (white to beige), calcite (wite to light gray), franklinite (black), hardystonite (white to beige), minor zincite (red-brown) and willemite from Franklin, New Jersey. 4 1/2" x 3 1/2". From the collection of Zack and Ralph Bonard, photo by WP.
Esperite, calcite, franklinite, hardystonite, minor zincite and willemite from Franklin, New Jersey under shortwave UV light. The esperite fluoresces yellow, calcite orange-red, hardystonite violet-blue, willemite green, the zincite and franklinite are non-fluorescent. 4 1/2" x 3 1/2". From the collection of Zack and Ralph Bonard, photo by WP.







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