Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by
mindat.org
There are no ages for
Gahnite
at
Cotopaxi Mine (Cotopaxi Lode; Gumaer Mine; Fannie Lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi District, Fremont Co., Colorado, USA