3685 Tschermigite, Libros sulphur mines, Libros, Teruel, Aragón, Spain

Ex Ruth Coulsell Collection No. 4132. A sulphate that has a bad effect of paper labels, as can be seen! The label no longer is in contact with the specimen. Labelled as simply Teruel, but only one sub locality in Mindat, so assuming that is where it is from.