New Mexico Mineral Symposium — Abstracts

The Philadelphia Mine is located in the Hanover mining district of Grant County, New Mexico. After a century of oblivion, it now has yielded specimens that will most certainly make it a noted locality within the state. Harrison Schmitt in his classic 1939 report on the Pewabic Mine noted the occurrence of large crystals of several specimens at the nearby Philadelphia. However, few, if any, examples of these are known today.

Recent work at this long-abandoned mine has produced numerous examples of quartz twins on the Japan law and some highly unusual magnetite composite crystals that may be pseudomorphs after a mineral, yet, unidentified. Occurring in a pegmatite-like environment, these minerals are associated with sprays of epidote, large apatites, beryl, and nearly two dozen other species.