Magic Mug Fluorescent Calcite Willemite Print Color Changing! Franklin, New Jersey Rocks!

Bring a sense of magic and wonder to your breakfast table with this new age mug! When cold the mug is black and when hot liquid is added the colorful pattern of fluorescent calcite & willemite from New Jersey is magically revealed!  The photographic image of this mineral specimen is from the collection of Jim Horste.  Note that the image is a NON-fluorescent photographic transfer of what the mineral looks like under black light.  The print on the mug itself does not fluoresce under black light.  

Changing color right before your eyes it brings a sense of fun and curiosity to those around you. Coming in 11oz and 15oz sizes, this mug is the perfect way to enjoy favorite warm holiday drinks in style!