This Scheelite is
from Trumbull, Connecticut.
Under normal light, it looks like an ordinary rock with spots of
quartz (no crystals).
When placed under shortwave ultraviolet, scheelite reveals itself
with it's
blue-white fluorescence. Scheelite will not respond to either Medium
wave
or Longwave ultraviolet.
The size of this specimen is 4" long X 3 1/2" wide x 2" thick.