Found Today, the mineral is found primarily in the Balmat-Edwards zinc district of  St. Lawrence County, New York, United States.Balmat Hexagonite; article; July 27, 2015; Fred Haynes blog; "WCGMC Activity;" accessed Aug 2017 It was also found in the Czech Republic in the Chýnov caves. Although very rare, it can be found elsewhere in other locations worldwide.
Occurrence The mineral is found primarily in the Balmat-Edwards zinc district of Edwards, St. Lawrence County, New York, United States.Balmat Hexagonite; article; July 27, 2015; Fred Haynes blog; "WCGMC Activity;" accessed Aug 2017 It was also found in the Czech Republic in the Chýnov caves. Litochleb J, Sejkora J (2007) Occurrence of tremolite-hexagonite in dolomite marbles in the Chýnov cave (southern Bohemia). Minerál 15: 124-126 (in Czech)
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Although very rare, it can be found elsewhere in other locations worldwide.
Litochleb J, Sejkora J (2007) Occurrence of tremolite-hexagonite in dolomite marbles in the Chýnov cave (southern Bohemia). Minerál 15: 124-126 (in Czech)