2.16 Art Deco Filigree Diamond Ring in Platinum2. 16 Art Deco Filigree Diamond Ring in Platinum. This Art Deco right hand ring features a marvelous filigree design and 2. 16 carats of natural diamonds in platinum. Elongated and elegant, the platinum metal work of this ring is a feast for the eyes. Down the center, a row of Old European Cut diamonds create the centerpiece of the ring. The primary center stone weighs in at . 36 carats and is near colorless. The four accent diamonds above and below,