Fluorite

An ice cube clear modified dodecahedral crystal with alternating frosted faces. The point of attachment was on one side where remnants of calcite and sphalerite are attached. Looking through one of the window faces one sees the back of the specimen. The purple in the photos is unknown, likely a reflection, as there is no color save the small area of matrix.  From Herb Oboddas personal fluorite collection (with label). Outstanding competitive specimen.

Locality: Naica, Chihuahua Mexico

Composition: calcium fluoride