Starkeyite, a magnesium sulfate hydrate mineral, was identified by [Dunn] as part of a white powdery efflorescence assemblage associated with mcallisterite on willemite-franklinite ore from Sterling Hill. The mineral was identified using X-ray methods, and no physical or chemical measurements have been made. It has not been reported from Franklin. (Dunn, 1995)

 Location Found: Ogdensburg
 Formula: MgSO4 · 4H2O
 Essential Elements: Hydrogen, Magnesium, Oxygen, Sulfur
 All Elements in Formula: Hydrogen, Magnesium, Oxygen, Sulfur
 IMA Status: Approved
Fluorescent Mineral Properties

 Shortwave UV light: White, rare
 Mid wave UV light: White, rare
 Longwave UV light: White, rare
 Additional Information: Phosphoresces white
 To find out more about this mineral at minDat's website, follow this link   Starkeyite

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.639

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 58, No. 1 - Spring 2017, pg. 19Fluorescent Minerals of Franklin and Sterling Hill, N.J., Part 2, Richard C. Bostwick - Starkeyite
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