Search Mineralpedia – A Mineral Photo Database and Identification Guide

Named for the type locality near Bergen at the Streuberg quarry in Vogtland, Saxony, Germany. Bergenite is a rare mineral that occurs at the type locality on a mine dump in association with uranocircite, torbernite, autunite, dewindtite, and barian uranophane. Additional localities include other German mines, as well as in the United States in Utah, and in France at Les Montmins in Auvergne. Bergenite is highly radioactive and will fluoresce a pale green under short-wave ultraviolet light.

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

Pierre Berthier, a French geologist, is the namesake of Berthierine. It is a rare mineral that occurs in localities in France, England, Russia, Japan, Canada, and a few others. Berthierine occurs in unmetamorphosed marine sediments as well as in lateritic and polar soils. Associated minerals include glauconite, siderite, calcite, and chlorite-vermiculite that is interstratified with mica-smectite.

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

Named for French mineralogist Emile Bertrand. An uncommon mineral that is found in fissures in granite and associated pegmatites, as well as in crystal lined cavities in greisens, and is often found as an common alteration product of beryl, but rarely as a primary mineral. Numerous localities, however pure specimens and large crystals come from localities in France, the Czech Republic, Italy, the United States, Mexico, Brazil, Namibia, South Korea, and Kazakhstan. Minerals associated with Bertrandite include beryl, phenakite, herderite, tourmaline, muscovite, fluorite, and quartz. Bertrandite is pyroelectric and will generate a charge in response to temperature changes.

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