"Ecole des Mines" (Paris) Malachite Malachite (6 x 7.7 cm) from Chessy (Rhône dpt, France) with its label (6.1 x 4.4 cm) from the collection of the "Ecole des Mines" (Paris) indicating that the specimen was given by Mr. Thibaud; numbering "d6" is reported on a small label glued at the back of the specimen.