KOH-I-NOORThe famous Koh-I-Noor (Persian for Mountain of Light) diamond was found near Kollur in India. Originally weighing 793 carats and once the largest known diamond in the world, its size has been reduced to 105.6 carat after many cutting and polishing. Koh-i-Noor diamond passed several hands through dynasties, rulers and invasions and eventually landed up as a British Crown Jewel. It currently is a part of the Crown of Queen Elizabeth.
ELIZABETH TAYLOR DIAMONDFormerly known as Krupp diamond, the Elizabeth Taylor diamond, a 33.19 carat Asscher cut Type IIa diamond, was bought by Elizabeth Taylor’s husband – Richard Burton in 1968 at a NY auction for USD 300,000. The diamond became an important part of Taylor’s collection and she wore it as a ring. In 2011, the Elizabeth Taylor diamond was sold by Taylor’s estate for USD 8.8 million.
ARCHDUKE JOSEPH DIAMONDOriginally weighing 78.54 carat, the Archduke Joseph diamond, a antique cushion-shaped, colorless, brilliant, Type IIa, was purchased by Molina Jewelers of Arizona in 1990s and was recut to 76.45 carat for improved clarity and symmetry. The IF, D grade is the largest DIF diamond ever graded at GIA. Recovered in India’s Golconda mines, the Archduke Joseph diamond’s first recorded owner was Austria’s Archduke Joseph August who had deposited the diamond in a Hungarian bank vault in 1933.
Similarly, there are many other famous Type IIa diamonds including The Star of the South, Winston legacy, The Agra, Darya-i-Noor, Beau Sancy and so on. Type IIa diamonds are either way very rare and declining production of Earth-mined diamonds make them even rarer.