When Kate and Prince William got engaged, the Duchess was given the sapphire engagement ring that once belonged to Princess Diana.
The ring features a central sapphire with diamonds and it could be worth up to £300,000, experts at jewellers Joshua James explained.
They told Express.co.uk: "Kate’s engagement ring is incredibly famous, known for sparking a huge increase in sales of sapphire engagement rings back in 2010.
"It features a 12-carat oval sapphire set in 18k white gold, surrounded by 14 solitaire diamonds. Created by Garrard & Co., the former Crown Jeweller, it is now valued at around £300 000.
Source : https://www.express.co.uk/life-style/style/1286030/kate-middleton-news-prince-william-ring-jewellery-royal-wedding-latest-pictures