petanque

plural petanques

1. alternativeuncountableAlternative form of pétanque (“French boules game”).
2. countabledateduncountablebusinessAny of various ores, including forms of silver sulfide (such as stephanite) and the copper ore tetrahedrite.

   First-discovered mine in the District; gave much "petanque" (stephanite, or silver glance).

   1883, Charles Bunker Dahlgren, Historic Mines of Mexico

   2 more examples

   There are other openings on the ledge between the ends of these claims, but all are small and filled with debris, but it is an interesting and notable fact that all the workings show the rich sulphide of silver, or petanque ore […]

   1902, Reports Mining Engineers, Cieneguita Copper Company, page 26

   Petanque, or "gray copper ore" (tetrahedrite) is the sort for which the Mexican prospector is constantly on the lookout.

   1906, Engineering and Mining Journal, volume 82, page 629