| On July 21, 1967, the mineral
galena was adopted as the official mineral of Missouri.
Galena is the major souce of lead ore, and the recognition of
this mineral by the state legislature was to emphasize Missouri's
status as the nation's top producer of lead. Galena is dark
gray in color and breaks into small cubes. Mining of galena
has flourished in the Joplin-Granby area of southwest Missouri,
and rich deposits have been located in such places as Crawford,
Washington, Iron and Reynolds counties.