 | The Blue Heart weighs 30.82 carats finished and was first recorded around 1900. The stone changed hands several times until it was donated to the Smithsonian Institution in Washington D.C. where it remains to this day. |  |
 | The Ashberg diamond is one of the first diamonds discovered in South Africa in the mid 1860s and used to be part of the Russian Crown Jewels, a collection that started in 1719. After the 1920s, the Crown Jewels were transferred to the Kremlin Diamond Fund. In 1934 a Russian trade delegation sold the diamond to Mr. Ashberg. The stone is 102.48 carats and is amber or brownish yellow with a glance of orange. (type Ib) |  |
 | The DeYoung Red Diamond is one of the largest known natural fancy dark red diamonds. It is a modified round brilliant cut diamond that has a clarity grade of VS-2 and weighs 5.03 carats. The diamond was acquired by S. Sydney DeYoung, a Boston jeweler, as part of a collection of estate jewelry in which it was wrongly identified as a garnet. It was gifted to the National Gem Collection by Mr. DeYoung in 1987. |  |
 | The Sancy weighs 55 carats and is a pear shape. It was first owned by Charles the Bold, Duke of Burgundy, who lost it in battle in 1477. The stone is named after a later owner, Seigneur de Sancy, a French Ambassador to Turkey in the late 16th century. He loaned it to the French king, Henry III, who wore it in the cap with which he concealed his baldness. Henry IV of France also borrowed the stone from Sancy, but it was sold in 1664 to James I of England. In 1688, James II, last of the Stuart kings of England, fled with it to Paris. It disappeared during the French Revolution. It reappeared in 1828. In 1867 it was displayed at the Paris Exposition. The Sancy surfaced in 1906 when bought by William Waldorf Astor, 1st Viscount Astor. The family possessed it for 72 years until the 4th Viscount Astor sold it to the Louvre for $1 million in 1978. The Sancy now rests in the Apollo Gallery. |  |
 | The Koh-i-Noor, ("Mountain of Lights"), is a 105.6 carat diamond, believed to have originated in the state of Andhra Pradesh in India around 1300. It has been said that whoever owned the Koh-I-Noor ruled the world. In 1850, the diamond was confiscated from Duleep Singh by the British East India Company and became part of the British Crown Jewels when Queen Victoria was proclaimed Empress of India in 1877. The diamond is currently set into the Crown of Queen Elizabeth and is on display at the Tower of London. |  |
 | The Steinmetz Sirius is a 103.83 carat D IF cushion shaped diamond mined from the Premier mine in South Africa. This legendary cushion shaped stone is claimed to be one of the largest D colored, internally flawless diamonds to ever appear at auction and is only the fourth of its kind (over 100 carat) to be sold at auction. |  |
 | The Steinmetz Pink is 59.60 carats and rated in color as Fancy Vivid Pink by the Gemological Institute of America. The Steinmetz Pink is the largest known diamond having been rated Vivid Pink. The Steinmetz Group took a cautious 20 months to cut the Pink. Its origin and history is unknown. |  |
 | The Kimberley Diamond gets its name from the mine in South Africa where it was found sometime before 1868. It was cut from a 490-carat stone. It was turned into a 70-carat gem in 1921 and recut to its present form in 1958 to improve its brilliance and proportions. |  |
