Galena

She bought from him some galena.

You can easily extract lead from galena, a natural mineral which has been used in crystal radio receivers.

1942, G. F. Loughlin, A. H. Koschmann, Geology and Ore Deposits of the Magdalena Mining District, New Mexico, Geological Survey Professional Paper, Issue 200, page 98, The galena of the ore contains microscopic inclusions of various forms that become visible upon polished surfaces etched with hydrochloric or nitric acid.

These samples had higher Pb²⁰⁶ and Pb²⁰⁸ abundances than any other galenas yet examined.

Very little galena has been reported (recovered mostly from burial mounds) in the Great Lakes region indicating that the mineral was not a major interregional exchange commodity during this period. However, numerous galenas have been recovered from the lower Mississippi Valley region and Florida indicating that galena was part of an important north-south exchange system (Walthall 1981).