FTP name this mineral, principally composed of lead sulfite, for which the Illinois hometown of Ulysses Grant is named.
Gray with a grayish-black streak, it has a hardness of only 2.5 on the Moh scale.  Deposits in Idaho and Colorado contained enough silver to be mined for it, but its better known since ancient times as an ore for lead.  FTP name this mineral, principally composed of lead sulfite, for which the Illinois hometown of Ulysses Grant is named.
Gray with a grayish-black streak, it has a hardness of only 2.5 on the Moh scale.  
galena