Serpierite, a calcium copper sulfate hydroxide hydrate mineral, was first found by David Cook in 1971 and was subsequently verified by [Dunn] on a number of specimens. It occurs as light blue microcrystals and thin light-blue films on calcite-bearing specimens of nondescript appearance and is rare. It is known from Sterling Hill, but not from Franklin. (Dunn, 1995)

 Location Found: Ogdensburg
 Year Discovered: 1881
 Formula: Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O
 Essential Elements: Calcium, Copper, Hydrogen, Oxygen, Sulfur
 All Elements in Formula: Calcium, Copper, Hydrogen, Oxygen, Sulfur, Zinc
 IMA Status: Approved, 'Grandfathered' (first described prior to 1959)
 To find out more about this mineral at minDat's website, follow this link   Serpierite

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. 14, No. 1 - February 1973, pg. 9Mineral Notes - Serpierite (small article)

Serpierite surface coating and sprays on gypsum, Sterling Hill Mine, Ogdensburg NJ
Serpierite surface coating and sprays (light blue) on gypsum from Sterling Hill Mine, Ogdensburg NJ. Field of view 3 mm. From the collection of, and photo by DW.

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