From Cartier and Van Cleef & Arpels to David Webb and beyond, the September 22nd sale of Important Jewels in New York is headlined by a vast selection of signed jewels from a variety of celebrated makers. Classic white diamonds, such as this 27.35 carat...

Platinum and diamond brooch, David Webb. Photo Sotheby's Designed as a rose blossom centering three old European and old mine-cut diamonds weighing 4.63 carats, further set with numerous round, old European and single-cut diamonds weighing approximately...

An elegant platinum and diamond brooch, Cartier, France. Photo Sotheby's Suspending an articulated pendant of geometric design, the top centered by an antique cushion-cut diamond weighing approximately 5.30 carats, the top and fringes accented by five...