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Named for the type locality in the Pereta mine in Tuscany, Italy. Peretaite is a rare mineral found only at its type locality and a couple other mines in Italy, as well as possibly one purported mine in Luxembourg. At the type locality, it forms as a result of sulfuric acid acting on stibnite in oxidized, limestone-hosted, hydrothermal, antimony-rich deposits.

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


Named after Frank Croydon Perham, an American geologist and pegmatite miner in Main, USA. Perhamite is an uncommon mineral the forms in isolated masses in an amblygonite-rich pegmatite at one of its co-type localities at the Bell Pit in Maine. Other localities include another in the United States in Nevada, and in South Australia, among a few others.

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


Swedish economic geologist at the Geological Survey of Sweden Per Adolf Geijer holds the namesake of Perite. A rare mineral at few localities, some of which include Sweden, Greece, the United States, and Australia. At its type locality at Långban in Sweden, Perite can be found “in fissures in skarn in a metamorphosed Fe-Mn deposit,” while at other localities it is found in oxidized base-metal deposits which are bismuth-rich.

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

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