Claim: First named in 1797 Bournonite is found in hydrothermal deposits like galena and barite which occur near the earth's crust and usually near volcanos.
Evidence: It was first mentioned by Philip Rashleigh in 1797 as an ore of antimony and was more completely described in 1804 by French crystallographer and mineralogist Jacques Louis, Comte de Bournon (1751–1825), after whom it was named.