What famous diamond from the French Crown Jewels is displayed in the Louvre?

The famous diamond from the French Crown Jewels displayed in the Louvre is the Regent Diamond.

The Regent is a 140.64-carat, pale-blue-white diamond mined in India’s Kollur region and cut in London between 1704 and 1706. Its exceptional clarity and size made it one of Europe’s most celebrated gems. The French Crown acquired it in the early eighteenth century, and it was set in the crown made for Louis XV’s coronation in 1722.

The stone survived the upheavals of the French Revolution after being stolen with other crown jewels in 1792 and later recovered. Napoleon Bonaparte subsequently used it in the hilt of his sword. It was also associated with Marie Antoinette and later French rulers before becoming part of the state collection.

A common mix-up is the Hope Diamond, which has a French royal history but is now in the Smithsonian Institution in Washington, D.C. The Regent remains in Paris, where it is displayed with other French Crown Jewels in the Louvre’s Apollo Gallery.