Up for your consideration is a 100% authentic David Yurman Sterling Silver Chalcedony & Diamond Quatrefoil  Necklace.

The carved Chalcedony is about 7MM x 7MM, set in a pave diamond quatrefoil, which is about 13MM X 13MM.

 The necklace is about 16 7/16" in length,  the quatrefoil and Chalcedony drop about 2".

Hallmarked DY  925.

Even though pre-owned, the  necklace shows minimal wear, is in excellent preowned condition.