This is a vintage VFW Ladies Auxiliary Necklace.  It has a goldtone chain with goldtone design around a black oval stone that may be Onyx.  It has a goldtone VFW emblem with black enamaling.  Chain is 24 inches with a standard clasp. The pendant is 1 3/8 inches long and 1 1/4 inches wide. See pictures for full description.