Fluorite, Pyrite, Calcite     Naica, Chihuahua, Mexico.  Here is a very attractive plate measuring 4.5 x 4.1 x 1.7 cm with crystals to 1.7 cm on edge.  Fine octahedrons in the classic "Aztec Pyramid" form.  The crystals are nearly transparent and on what appears to be a black sulfide or garnet.  On the fluorites are small white calcites and bright pyrites.  A very attractive mix that is no longer common to see in the mineral market.  Zero damage.  $125