A collection of eight specimens, including, in particular, a malachite from the Congo, a malachite from Morocco, a calcite from the Gard, a gypsum, a calcite and a graphite of unknown origin, as well as a barite from Saint-Laurent-le-Minier, Gard, France (dimensions ranging from 2 x 5 x 2 cm to 4 x 9.5 x 6 cm – as found)