On October 19th, Sotheby's will auction off a dazzling array of jewels, from a 29.53 carat flawless pear-shaped diamond ring to exquisite pieces designed by Van Cleef & Arpels, Bulgari, David Webb and Tiffany & Co. The sale, which will take place at Sotheby's New York headquarters, will feature jewels from private American collections, as well as a selection of high quality white diamonds and signed and period pieces.

The 29.53 carat pear-shaped diamond is the centerpiece of the auction. The D color, internally flawless stone has been recently determined to be both potentially flawless and type IIa by the Gemological Institute of America. The ring has an estimate of $1.8 million to $2.2 million or $61,000 per carat.

Another stunning piece is a fancy vivid yellow diamond ring by Tiffany & Co., which is set with a potentially flawless emerald-cut stone of 9.55 carats in a diamond crossover mounting. Its estimate is $250,000 to $350,000.

Also featured at the sale will be an 18 Karat gold, diamond and amethyst "Botticelli" necklace by Van Cleef & Arpels. Designed with a foliate motif, it has an estimate of $50,000 to $70,000.

A diamond butterfly brooch by Bulgari, which is set with over 24 carats of diamonds, has an estimate of $50,000 to $70,000, while a David Webb-designed abstract star-shaped Abalone Pearl, Cultured Pearl, Diamond and Emerald Brooch has an estimate of $20,000 to $30,000.

The jewels will be on exhibition at Sotheby's New York showroom beginning on October 14th, 2009. An online catalogue is available to preview at Sotheby's website.

Gallery: Sotheby's Jewelry Auction