Cressida Bonas
Cressida Bonas is dating a man named Harry. Pictured: Bonas poses for pictures as she arrives for the WE Day event in north-west London, on March 7, 2014. Getty Images/Carl Court/AFP

Prince Harry’s ex-girlfriend, Cressida Bonas, just got engaged to Harry Wentworth-Stanley.

Wentworth-Stanley’s stepfather is the cousin of Queen Elizabeth II. Bonas’ fiancé works as a property surveyor for Savills.

Following their engagement, it was revealed that Wentworth-Stanley gave Bonas an engagement ring that features a very rare gem. The ring has a large center diamond surrounded by rubies. Another ring is filled with diamonds.

The beautiful ring was designed by Bear Brooksbank, who said that the design was inspired by a unique trend among young couples. Rachel Garrahan, a jewelry and watch director for Vogue, also talked about Prince Harry’s ex-girlfriend’s ring.

“Cressida's ring is a bold octagonal design featuring a large diamond surrounded by a halo of rubies and another of smaller diamonds. Its unusual design is typical of the welcome trend for couples to go for a highly personalized engagement ring rather than the standard solitaire,” she said.

Lily Gatehouse, the brand manager for Bear Brooksbank, told Where To Get It that their rings can range up to £25,000. “Rings are priced on designed time, materials (so metal and stones), and labor time,” she said.

Meanwhile, Prince Harry gave Meghan Markle a £122,500 engagement ring when he asked her to marry him. Grant Mobley, a gemologist, said that he came up with the estimate after seeing photos of the stunning jewelry.

“From seeing the pictures, I would estimate that the center diamond is a slightly elongated cushion cut diamond, approximately 3.00 - 4.00 carats. The side diamonds are more than likely oval or round cut diamonds about 0.75 carats each… The value of such a center diamond greatly depends on the color and clarity of the stone… While it is very difficult to tell the clarity without examining the stone, one would imagine Prince Harry would pick something close to flawless,” he said.

Markle’s engagement ring is also extra special because Prince Harry included Princess Diana’s diamonds in the design.