All that glitters jewelry in Sotheby's "Magnificent Jewels" Fair

Diamond and colored gemstone jewels, including a yellow diamond necklace estimated to be worth $2 million to $3 million, have auctioned at Sotheby's "Magnificent Jewels" Fair in New York on April 20, 2010.

This ruby and diamond flower brooch, originally from Van Cleef & Arpels, Paris, in 1967, contains round and baguette diamonds weighing approximately 4.05 carats. The petals are "mystery-set" with calibre-cut rubies, mounted in platinum and 18 karat gold. Van Cleef & Arpels created the mystery setting technique, in which prongs are concealed beneath the gems they hold.

Estimated value: $60,000 to 80,000

This pieces is from the collection of Virginia winemaker and philanthropist Patrcia Kluge, including this platinum, sapphire and diamond ring. The cushion-shaped sapphire, weighing about 21.30 carats, is framed by round and single-cut diamonds weighing about 5.7 carats.

Estimated value: $200,000 to $300,000

Birds of a feather

Crafted around 1940, this brooch depicts birds in flight. The wings are set with segments of cabochon moonstones, accented by round and single-cut diamonds and calibré-cut rubies.

Estimated value: $25,000 to $35,000

Sotheby is believes this to be the first necklace set entirely with fancy-vivid yellow diamonds ever to appear at auction. The 42 diamonds weigh a total of 100.17 carats.

Estimated value: $2 million to $3 million

Pear-shaped pair

These pendant earrings feature pear-shaped emeralds weighing 10.58 and 9.76 carats, and diamonds weighing approximately 2.50 carats, mounted in platinum.

Estimated value: $350,000 to $450,000

Dating to about 1890, this brooch/hair ornament is in the shape of a flying swallow. It has diamonds applied with white enamel, mounted in 10 karat gold.

Estimated value: $30,000 to $40,000

Dietrich's diamonds

Dating to about 1930, this platinum and diamond brooch once belonged to actress Marlene Dietrich.

Estimated value: $30,000 to $50,000

The Duchess of Windsor's Jewels will Auction

As American socialite, when the King Edward VIII proposed to twice-divorced, he caused a royal scandal. The man is give up his kingdom for love,and never stopped lavishing his wife with jewelry.

It's been 23 years since the last auction of the Jewels of the Duchess of Windsor, now Sotheby's will offer twenty pieces for sale in London on November 30. The total sale is expected to up to £3 million ($4.582 million). The above is a diamond bracelet by Cartier, that once belongs to Wallis Simpson,it is appeared in front of a Cecil Beaton portrait of her. The bracelet is expected to raise 350,000-450,000 pounds.

Jeanne Toussaint, Cartier's High Jewelry Director, created this realistic onyx and diamond panther bracelet designed in 1952. It's considered one of the best "three dimensional "great cats jewels of her.

The bracelet is expected to fetch 1,000,000-1,500,000 pounds ($1,520,000- 2,300,00). The completely articulated piece forms a "stalking pose" when clasped.

Jeanne Toussaint also created this flamingo brooch, decorated with rubies, sapphires, emeralds, citrines, and diamonds. It was bought by the Duchess in 1940. During the 1987 sale, this brooch caught the imagination of the world and became the emblem of the sale. It is listed with an estimate of 1,000,000-1,500,000 pounds ($1,520,000- 2,300,00).

The Windsors often incorporated their initials into the designs as shown in this emerald, ruby and diamond brooch by Cartier. This brooch is expected to realize 100,000-150,000 pounds ($152,000- 230,000). This piece was commissioned by the Duke in 1957 to mark their 20th wedding anniversary (note the Roman numerals at the base of the piece).

In addition to the Cartier pieces, the auction will also include a gold, mesh, ruby, turquoise and diamond purse by Van Cleef & Arpels. And a series of silver items and medals that were the property of Edward once, the Prince of Wales.