Cuprostibite, a copper antimonide mineral, was first described from Franklin by Burke and Dunn (1988); it is not known from Sterling Hill. The associations, texture, and conditions of occurrence are the same as those given for domeykite. Grain size is less than 30 microns. Microprobe analysis yielded Cu 50.1, Sb 48.8, total = 98.9 wt. %. (Dunn, 1995)

 Location Found: Franklin
 Year Discovered: 1969
 Formula: Cu2(Sb,Tl)
 Essential Elements: Antimony, Copper
 All Elements in Formula: Antimony, Copper, Thallium
 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   Cuprostibite

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.544

The Picking Table References
 PT Issue and PageDescription / Comment
View IssueV. 29, No. 2 - Fall 1988, pg. 12Mineral Notes Research Reports, Cuprostibite & Domeykite
View IssueV. 29 No. 1 - Spring 1988, pg. 7Notes from the Laboratory & Changes to the List of Species From Franklin and Sterling Hill, Pete J. Dunn, John L. Baum, Additions to the list, Cuprostibite
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