Pharmacolite, a calcium arsenate hydrate mineral, occurs at Sterling Hill as minute, colorless, radiating crystals on red-fluorescent calcite, associated with picropharmacolite and calcite. Pharmacolite was verified by Dr. Eugene Foord of the U. S. Geological Survey, using X-ray and chemical analytical methods.
It is fluorescent in shortwave ultraviolet with a weak violet response color. It is not known from Franklin and is rare locally. (Dunn, 1995)

 Location Found: Ogdensburg
 Year Discovered: 1800
 Formula: Ca(HAsO4) · 2H2O
 Essential Elements: Arsenic, Calcium, Hydrogen, Oxygen
 All Elements in Formula: Arsenic, Calcium, Hydrogen, Oxygen
 IMA Status: Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Fluorescent Mineral Properties

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

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.676

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 58, No. 1 - Spring 2017, pg. 15Fluorescent Minerals of Franklin and Sterling Hill, N.J., Part 2, Richard C. Bostwick - Pharmacolite
View IssueV. 31, No. 2 - Fall 1990, pg. 3Notes from the Laboratory & Changes to the List of Species From Franklin and Sterling Hill, Pete J. Dunn, John L. Baum, Pharmacolite
View IssueV. 14, No. 2 - August 1973, pg. 6Mineral Notes Recently Validated - Pharmacolite (small article)
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