The royal Portland tiara, worth millions, stolen from stately home

In a very Hollywood-esque heist, a royal tiara with major historical significance was stolen from Nottinghamshire's Welbeck Estate. 

The jewel was being housed in the estate's Portland Collection Gallery when the thieves broke the glass and drove off with it last week.

The Portland Tiara was commissioned from Cartier by the sixth Duke of Portland for his wife, Winifred Cavendish-Bentinck, to wear to King Edward VII's coronation at Westminster Abbey in 1902. Winifred was selected as one of four canopy bearers for Alexandra, Queen Consort, for the ceremony.The Duchess of Portland in the tiara in 1902 (Getty) 

Encrusted with diamonds and set in gold and silver, the intricate piece also features the Portland diamond in the middle, two drop diamonds and surrounding pendants. 

Experts have trouble placing a price on the artifact, but it's "worth millions" they believe -- and they fear the thieves will break up the tiara and sell its parts individually. Curator of jewelry at the Victoria Albert Museum called the piece "one of the great historic tiaras of Great Britain," according to Hello!

Police arrived at the scene only 90 seconds after the thieves made their escape in a white Audi. 

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Kate Middleton's most impressive jewelry
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Kate Middleton's most impressive jewelry

The Cartier tiara, worn on her wedding day to Prince William, and the matching earrings given to her by her parents.

Photo: UK Press via Getty Images

Her diamond and sapphire engagement ring.

Photo: Chris Jackson/Getty Images

The Lotus Flower tiara, worn in 2013 to a Diplomatic Reception with Prince William.

Photo: Splash News

The ruby and diamond necklace and bracelet, which the Duchess wore to the Sun Military Awards in December 2011.

Photo: ARTHUR EDWARDS/AFP/Getty Images

A closer look at the necklace worn to the Sun Military Awards.

Photo: Indigo/Getty Images

The sparkling diamond fern brooch worn during the royal tour of Australia and New Zealand, when the royal family touched down in New Zealand.

Photo: Samir Hussein/WireImage

These vibrant blue sparklers, borrowed from her mom, Carole Middleton, and worth nearly $20,000.

Photo: Samir Hussein/WireImage

The Lotus Flower Tiara, again for a state reception with the President of China, paired with two diamond bracelets -- one called The Wedding Gift, with geometric elements, and the second, which has also been worn as a necklace. All of Kate's jewels were borrowed from the royal vault.

Photo: Dominic Lipinski/PA Archive

The Cambridge Lover's Knot Tiara, worn during a diplomatic reception at Buckingham Palace, one of the late Princess of Wales's favorite tiaras.

Photo: Yui Mok/PA Wire

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