Anne, Princess Royal, has been married twice, and both of her engagement rings were quite unique.

Meghan Markle’s was designed by Prince Harry and includes diamonds that belonged to Princess Diana.

Her current one, specifically, is an oval cabochon-cut blue sapphire.

Princess Anne smiling

“Meanwhile, the Queen is frequently seen sporting the gemstone on her famous brooches,” Stone continued.

Anne, the Princess Royal and Mark Phillips pose on the balcony of Buckingham Palace in London, UK, after their wedding