5747 Stibnite, Calcite, Jamesonite, Sombrerete Mine, Sombrerete, Sombrerete Municipality, Zacatecas, Mexico

Labelled as boulangerite, El Sombrette Mine, Durango. Likely jamesonite, and from the Sombrerete Mine, in Zacatecas, but close to the border with Durango. Ex John Lewis Collection.