The world's largest 'flawless' diamond ever to put up for auction could sell for more than $20million.
The pear-shaped diamond is one of only a handful in the world that to have been graded by experts to have both perfect colour and clarity.
And at 101.73 carats it is more than twice the size of a similar 'flawless' diamond which recently sold for $9.4million.(source)
The Archduke Joseph Diamond.
This cushion-cut diamond once set the world record at auction for a colorless diamond, and Celine Dion wore it around her neck after it was fashioned into a necklace for a TV special.
Star of Africa.
Star of Africa, the world's largest flawless cut diamond. It is a whopping 530 cts!
A massive 478-carat diamond was found at the Letseng Mine in Lesotho, a small kingdom in South Africa. It is the 20th largest rough diamond ever found, and it came from a mine that has already delivered three of the world's largest diamonds: the 603-carat Lesotho Promise, the 493-carat Leteng Legacy and the 601-carat Lesotho Brown. A similar but smaller-sized rough stone has recently been valued at $12 million. It is hoped that the uncut diamond will be capable of producing a 150-carat polished gem stone, dwarfing the current largest gem, the Koh-i-Noor Diamond.
The Centenary Diamond.
The Centenary Diamond, weighing in at 273.85 carats – or 54.77 grams – is renowned not only for its size but also its flawless coloring. The Gemological Institute of America gave the Century Diamond a D in color, which is the highest grade of colorless diamond, meaning it is internally and externally flawless. The gem was discovered in the Premier Mine in South Africa on July 17, 1986, and was given its name after it was presented in the rough for the Centennial Celebration of De Beers Consolidated Mines on May 11, 1988. The Centenary Diamond was unveiled in its final form in May 1991, with 247 facets: 164 on the pavilion and crown, and 83 on the girdle. The gem was never publicly appraised for value but it was insured for more than $100 million at the time of its unveiling in 1991.
The heart of Eternity.
The Heart of Eternity. This heart-shaped vivid blue diamond was found in the South African Premier Diamond mine. The original stone from which the gem was cut weighed in at 777 carats. Color: Fancy Vivid Blue, Carat Weight: 27.64, Clarity: VS2, Cut: heart shaped.
The Steinmetz Pink Diamond.
The Steinmetz Pink Diamond was discovered in southern Africa and is the largest Fancy Vivid Pink diamond known in the world. It weighs 59.60 carats
The William Goldberg Diamond.
The William Goldberg Diamond Corporation, famous for outstanding stones like the Premier Rose and the Guinea Star, cut this gem from a 13.90-carat rough. They transformed the piece into a spectacular red diamond weighing 5.11 carats. The GIA states, "It is the largest Fancy Red, natural color diamond that we have graded as of the date the report was issued." The stone is a triangular brilliant, sometimes refered to as a trillion or a trilliant cut. It was cut sometime in the mid-1990s.
The Pink Star.
The 59.6-carat Pink Star diamond sold today, 11/13/13, for a record 83.4 million dollars. Its auction estimate was 60 million. It was bought by a New York diamond cutter who has renamed it 'Pink Dream'.
Blue Lili Diamond.
This 30.06-carat blue diamond was cut by the William Goldberg Corporation. He named the stone after his wife, Lili. The stone's shape is a sort of tapered cushion.
The hope diamond.
Hope Diamond ($250 million). Among the most romanticized jewels in the world, the Hope Diamond is housed at the Smithsonian's National Museum of Natural History and considered the second-most visited piece of art in the world (behind the "Mona Lisa"). Discovered in India in 1812, the 45.52-carat blue-gray stone has had many owners over the years. The diamond is also said to be cursed—including the alleged suicides of several of its owners.
The Argyle Toki .
The Argyle Toki is a 1.59ct emerald cut Fancy Intense Purplish Pink diamond, named after the Toki, a rare Japanese bird with delicate pink underwings.
The Argyle Cardinal.
The Argyle Cardinal, from the Argyle Pink Diamonds Tender 2014, is a 1.21ct radiant cut Fancy Red diamond, named after the Northern Cardinal, a rare North American bird known for its deep red plumage and sweet voice.