Camilla's engagement ring is an emerald-cut diamond with baguettes on the side.

It was a gift from King Charles and originally belonged to the Queen Mother.

Camilla wears jewelry from Queen Elizabeth II and the late Queen Mother's collections.

The Greville tiara is her favorite piece of jewelry.

The ring is estimated to be worth £212,000, making it the second most expensive royal ring.

The Queen Mother was seen wearing the ring in the 1980s.

The ring's previous owner and origin are unknown.

Kate Middleton's ring is the most expensive British royal ring due to its historical legacy.

Prince William's sentimental attachment to Princess Diana's ring makes it perfect for the Princess of Wales.