Home > Mexico I – December 15 > MS1678 Beudantite


Beudantite is a lead iron arsenate sulfate hydroxide, and a member of the alunite supergroup (Bayliss et al., 2010). The mineral name honors François Sulpice Beudant (1787-1850), a French mineralogist at the l'Académie de Paris (now the Université de Paris) (Levy, 1826). Professor Beudant would go on to coin many mineral names, including anglesite and bismuthinite, in his seminal 1832 Traité de Minéralogie.

This specimen consists of manganese oxide matrix, sometimes called wad. Straw-yellow beudantite crystals to 1 mm cover a corrugated section of matrix, 2.5 × 2.5 cm. The luster is resinous, the beudantite crystals glinting as though metallic. Found summer 2020. Identification based on Raman spectroscopy. The exact locality at Santa Eulalia remains undisclosed, but it is likely one of the operating mines.

Price: $125

Item code: MS1678

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