Diamonds are a royal's best friend!

It's no surprise that the royal family showers their female members with beautiful jewels — just look at Kate Middleton's jaw-dropping engagement ring! The Duchess wears a ring that is not only aesthetically pleasing but also carries a deep significance because it used to be worn by Prince William's mother, the late Princess Diana.

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"It's very special to me, Kate's very special to me as well, I thought it only right to put the two together," William previously said of his decision to propose to Kate with his mother's ring. He's also stated giving Kate the iconic bauble helps keep his mother "close" to the royal family.

kate middleton ring

Kate showing off her gorgeous engagement ring.

The sparkler has sentimental value, but it is also worth a shocking amount of money. The ring's 18-carat oval sapphire is surrounded by 14 solitaire diamonds set in 18-carat gold — and is said to be worth $256,000.

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Today, Kate seems more proud than ever to be wearing Diana's engagement ring. "I would love to have met her, and obviously she's an inspirational woman to look up to," she once said.

Check out the gallery to see more stunning royal engagement rings!