Conichalcite, a calcium copper arsenate hydroxide mineral, was found by David Cook and verified by the writer using X-ray methods, which are suggested for verification; no physical or optical data exist. It occurs as small, fibrous, greenish masses admixed with carbonate minerals from Sterling Hill. It has not been reported from Franklin. (Dunn, 1995)

 Location Found: Ogdensburg
 Year Discovered: 1849
 Formula: CaCu(AsO4)(OH)
 Essential Elements: Arsenic, Calcium, Copper, Hydrogen, Oxygen
 All Elements in Formula: Arsenic, Calcium, Copper, Hydrogen, Oxygen
 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   Conichalcite

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.666

Frondel, Clifford (1972). The minerals of Franklin and Sterling Hill, a checklist. NY.: John Willey & Sons. p.51

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 13, No. 2 - August 1972, pg. 4New Validated Franklin/Ogdensburg Minerals - Conichalcite (small article)
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