Crystallised Minerals

This work shows several specimens from renowned English collections and from the collection of Jacques-Louis de Bournon (1751-1825), who had emigrated with Leroy de Barde in 1794 and later became director of the mineralogy collection of Louis XVIII. Among the minerals featured: in the lower left a piece of malachite and several stones from Siberia; and in the upper left a specimen of aventurine found in the ruins of the arch of triumph of Julius Caesar at Susa in the Piedmont.