“White fiber of rozenite (XRD anlysed) FOV 10 mm Collected by Georges Favreau and Vincent Bourgoin with the written authorization of the national Parc des Ecrins during the study of the deposit by the Jean Wyart association. Photo : Vincent Bourgoin This photo was published in "Bourgoin, V., Favreau, G., Boulliard, J.-C. (2011): Jas Roux: un gisement exceptionnel à minéraux de thallium. Le Cahier des Micromonteurs, 3-2011, 2-91". ”