This is a Beautiful never worn Designer Necklace, by Bijoux Givenchy, still with its Tag attached. It has Silvertone Links, with Beige or Tan Gold Enamel on 1/2 of each Link and they alternate on top or bottom of the Link.
The Necklace measures from about 15" up to about 17 1/2" with the extender chain. I see no other marking other than the Label. It is in Great Condition.
Bijoux Givenchy Enamel Silver tone Necklace with Tag