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Named after the type locality at the Good Hope mine near Headley in British Columbia. Hedleyite is a rare mineral with localities in, additionally, the United States, Bolivia, Kyrgyzstan, Uzbekistan, Russia, Finland, Poland, Italy, England, and India, among others. It occurs as a late-stage hydrothermal mineral in quartz veins as well as in skarn- and breccias-assocaited massive sulfides, and can additionanlly be found in pegmatites.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/hedleyite.pdf

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