In 1702, Jamchund sold the stone for about $100,000 to Governor Thomas Pitt of Ft. George, Madras, who was the grandfather of William Pitt of American Revolutionary fame. Known to historians as the “Elder Pitt,” William was the British Prime Minister for whom Pittsburgh, Pennsylvania, was named. He sent it to England and had it fashioned into a 140.50 carat cushion-shaped brilliant cut, measuring approximately 32mm × 34mm × 25mm. The cutting took two years and cost about $25,000, but a number of smaller stones brought more than $35,000; some of these were rose-cut stones that were sold to Peter the Great of Russia. The principal gem, which has but one very small imperfection, is today considered one of the finest and most brilliant of the known large diamonds.
The Regent Diamond’s facet pattern, from Gemcad. This design was originally
created by R.H., Long & Steele, but was missing the ‘needle’ pavilion facets
as well as the vertically split star facets on the crown. British gemologist
Michael Hing altered the design to be more accurate, adding the missing facets.
This image is a few screengrabs from the stone’s Gemcad file. If you’d like a
copy of the Gemcad file, please email me. Mr. Hing has personally handled a number
of large diamonds, among them the Hortensia, Sancy, Mouna and Tiffany Yellow.If you’d like a Gemcad file of this stone, please visit the United States Faceters Guild Yahoo Group.
It takes about 1 minute to join if you already have a Yahoo screen name.
The coveted gem disappeared, together with the equally famous Sancy and French Blue (from which the Hope was cut), when the Garde Meuble (Royal Treasury) was robbed of it’s fabulous jewels in 1792, during the early part of the Revolution. Some of the gems were soon recovered, but the Regent could not at first be traced. After fifteen months, however, it was found, having been secreted in a hole under the timberwork of a Paris garret.
In 1797, the great gem was pledged for money that helped Napolean in his ride to power. He had in mounted in the hilt of his sword that he carried at his coronation in 1804. When Napolean went into exile in Elba in 1814, Marie Louisa, his second wife, carried the Regent to the Chateau of Blois. Later, however, her father, Emperor Francis I of Austria, returned it to France and it again became part of the French Crown Jewels.
In 1825, Charles X wore the Regent at his coronation; it remained in the Royal Crown until the time of Napolean III. Then, a place was made for it in a Greek diadem designed for Empress Eugenie.
Many of the French Crown Jewels were sold at auction in 1887, but the Regent was reserved from the sale and exhibited at the Louvre amoung the national treasures. In 1940, when the Germans invaded Paris, it was sent to the chateau country, this time to Chambord, where it was secreted behind a stone panel. After the War, it was returned to Paris and put on display in the Apollon Gallery of the Louvre Museum. It was one of the features of the Ten Centuries of French Jewelry exhibition at the Museum in 1962. An alternate name sometimes used is the Millionaire Diamond. Source: DIAMONDS – Famous, Notable and Unique (GIA)