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Hartite

Named for the type locality at the Lignite mines in Hart, Austria. Hartite is a rare mineral that occurs in lignite seams and fractures and is obtained from the leaching of lignite with solvents and then by reprecipitation. Localities include, in addition to Austria, in  Italy, the Czech Republic, and Hungary. Hartite is associated with limonite and siderite.

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

Hausmannite

Named to honor former Professor of Mineralogy at the University of Gottingen in Germany, Johan Friedrich Ludwig Hausmann. It is an uncommon mineral, but widespread and with many localities. Hausmannite occurs in hydrothermal veins and also forms from the metamorphism of manganese-rich rocks. Localities for Hausmannite include Germany, Sweden, Wales, England, the United States, Canada, Brazil, Australia, South Africa, and Namibia, and others including some of economic importance.

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

Hawleyite

Named after Professor James Edwin Hawley, a Canadian mineralogist at Queen’s University in Kingston, Ontario. Hawleyite is a widespread but uncommon mineral and can be found in localities in Canada, the United States, the Czech Republic, Spain, Greece, Ireland, England, Russia, New Zealand, Chile, India and others. As Hawleyite is easily confused with greenockite, it is likely that there are other localities that have not been discovered as bearing Hawleyite yet. Fairly rare alteration product associated within fractures or in direct association with cadmium rich Sphalerite or other cadmium rich sulfides. Occurs as a fine, earthy, pulverulent bright orange to yellow coating.

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

Haydeeite

Named for the type locality at the Haydee mine in the Tarapaca region of Chile. Haydeeite is a rare mineral that can be found only at its type locality and one other Chilean locality at the Santo Domingo mine in the Arica and Parinacota region. Haydeeite is associated with atacamite, gypsum, halite and can occasionally be found covered by bassanite.

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

Haynesite

A rare mineral named in honor of Patrick Eugene Haynes, an American geologist and mineral collector/dealer who was the first to find the mineral. Haynesite can be found only at its type locality in the Repete mine near the town of Blanding in San Juan County, Utah, USA. There it occurs in oxidized uranium deposits in mudstones and sandstones. Haynesite is highly radioactive and will fluoresce a yellow-green under short-wave ultraviolet light.

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

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