Dramatic Modernist Deco-style collar necklace in black and white.  17 inches maximum length. Each piece is enameled in solid black and white.  There are silver speckles in the stones.  From an estate and never appears to have been worn.  Unsigned, but it could be Dior, Napier or a similar designer.    Very striking piece.  Heavier weight and of the best quality.  Silver tone metal backing is very nice.