Dwarves' Earth Treasures Online Museum: Datolites of Ontangon Co.
Mass, Superior, Bumblebee, Lake
& Lake Mines of Ontangon Co.
.
.
Mass, Superior and Bumblebee Mines are known to have produced some colorful
datolites, and I don't know if any datolites can be still found there since
I haven't explored those mines for dalolites.
Mass Mine, Mass City, Ontangon Co.,
MI.
Pink color, not sure if it's from Mass Mine or Nassau Mine.
