A paragon is a perfect diamond — flawless and without inclusions. In the 16th century, a mass of twelve carats was sufficient to qualify for this designation, but today the threshold lies at 100 carats.
The largest flawless diamond in the world is known as The Paragon, a D-class gem weighing 137.82 carats, and the tenth largest white diamond in the world.  The gem was mined in Brazil and attracted attention for being an exceptional white, flawless stone of great size. The Mayfair-based jeweller Graff Diamonds  acquired the stone in Antwerp, cut it into an unusual seven-sided kite shield configuration, and set it in a necklace which separates to both necklace and bracelet lengths. Apart from the main stone, this necklace also contains rare pink, blue, and yellow diamonds, making a total mass of 190.27 carats. The necklace has associations with the end of the millennium and was worn by model Naomi Campbell at a diamond gala held by De Beers and Versace at Syon House in 1999.
- Joan Younger Dickinson (2001), The Book of Diamonds, p. 215
- Graff Jewelry Company, LUXemag, 21 June 2009
- Dan McDougal (19 December 2008), The world's largest white diamonds, Daily Mail
- Dictionary of Gems and Gemology, Springer, 2005, pp. 558–619, doi:10.1007/3-540-27269-0_16, ISBN 978-3-540-23970-3
- Murphy, Robert (March 1, 2008), "In the cut", W
- Julia Neel (12 August 2009), "The Paragon", Vogue
- Suzy Menkes (June 15, 1999), Those Sparkling Celebrities
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