Dwarves' Earth Treasures Online
Datolites of Ontonagon Co.
Minesota, Victorian, Aztec, Toltec, Bohemian,
Evergreen & National Mines
are several mines around Rockland and Mass City where datolites
have been found.
Some are owned by Red Metal Retreat and some
of are already heavily dug up. I know very little about those
Old Minesota Mine,
Found by Jeffrey A. August 1996