Art Deco Filigree Necklace w/ Old European Diamond.  This lovely Art Deco pendant necklace is the epitome of filigree and features a .30 carat round diamond at its center and is finished in 14 karat white gold. This pendant was converted from a pin, which is still attached so it could be a versatile piece in your collection with more than one way to wear it. The chain is 18 inches in length and connects to a lovely filigree slide.