Sotheby's is hosting its New York sale of Magnificent Jewels on December 9, 2009 with a variety of flawless colourless diamonds, works of renowned jewellers including Cartier, JAR and Louis Comfort Tiffany, and jewels from the collection of a late fashion model, reports say. %% Amongst the colourless diamonds, Sotheby's is offering an oval diamond of 30.48 carats, D colour with flawless clarity and type IIa "Golconda-like" classification (estimated to sell for over $3.3 million). Unmounted exceptional diamonds to be featured include -an 18.11 carat round diamond, of H color, graded as triple-X with excellent cut, polish and symmetry (estimated to sell for $750,000 to $1 million), a 13.85 carat D color pear-shaped diamond of VS2 clarity cut for candlelight (estimated to sell for $400,000 to $500,000). Amongst the mounted stones there would be - a 9.69 carat square emerald-cut potentially flawless type IIa E color diamond of VVS2 clarity, that is embedded as a ring (estimated to sell for $350,000 and $450,000). %% Creations by renowned jewellers include an Egyptian-style jewelled scarab belt buckle ($250,000-$350,000) and an Egyptian-style lapis lazuli, turquoise, diamond, black onyx and enamel bracelet ($75,000-$100,000) from Cartier's 1920s period collection; Tiffany and Co.’s fancy intense-yellow diamond and emerald ring designed by Louis Comfort Tiffany circa 1915-1920, (estimated sale price: $200,000-$300,000), a Van Cleef and Arpels coloured-stone and diamond bracelet from 1930 (estimated sale price: $100,000-$150,000). Pieces from the collection of Lucia Moreira Salles, a former Brazilian model also a philanthropist, include three platinum gemstone rings with diamonds designed by Parisian designer JAR. %% The auction house believes that there is a growing number of buyers seeking diamonds with something unique, be it their legacy, shape or perfect quality. The sale is expected to realise over $20 million, reports say. The highlights of the auction will be showcased in Geneva, Hong Kong and Los Angeles, before the pre-sale viewing in December.