Fluorite

Wow!!!  This amazing small cabinet specimen is from the delightfully named Fairy Holes Pocket at Lady Annabella mine.  A large, semi-transparent deep sea-green interpenetrant twin sits central within a bed of smaller, intergrown single crystals of less intense sea-green, all with frosted pale peppermint face centres.  The interpenetrant twin measures 2 cm on edge and in daylight fluoresces an intense Royal purple, standing out form the surrounding crystals whose edges fluoresce a more subtle inky blue.  Just superb.