Research reveals most expensive royal engagement ring

When it comes to bling, the royals bring more of it to the table than some of the richest celebrities, with their engagement rings alone worth hundreds of thousands of dollars.

New research conducted by jewellery retailers Est1897 has determined the most valuable engagement rings among the British royals.

The research includes some of the most iconic rings in the extended British royal family, which have all been valued by a professional comparing the jewellery of Kate Middleton and Meghan Markle, Princess Diana and Camilla, Duchess of Cornwall, and Pippa Middleton and Princess Beatrice.

Kate Middleton has the most expensive royal engagement ring 

Kate's oval cut sapphire ring is perhaps the most iconic royal engagement ring, and is also the most expensive. The ring was originally selected by Lady Diana Spencer when she was engaged to Prince Charles in 1981 and is widely recognised and replicated due to its unique blue sapphire.

Purchased for $50,700 in 1981, Est1897 says the ring is now worth $707,295 - almost $500,000 more than Meghan's engagement ring. Meghan's ring also holds sentimental value, as the cushion cut contains two diamonds from Lady Diana's collection.

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Diana's ring is now worth over $500k more than Camilla's

Diana's sapphire oval cut ring is now worth more than $500,000 more than the one given to Prince Charles' second wife Camilla, according to Est1897.

Camilla's ring originally belonged to the Queen Mother, and was given to her by Charles in 2005 upon their engagement. The five carat emerald cut ring is now worth an estimated $180,000.

Queen Elizabeth's engagement ring is worth $227,500

Queen Elizabeth's engagement ring is relatively understated and is valued at $227,500. It's a three-carat, old European cut centre stone which is surrounded by smaller diamonds. Prince Phillip designed the ring himself, making use of diamonds taken from a tiara belonging to his mother, Princess Alice of Battenberg.

The research also includes Kate Middleton's sister, Pippa, and the Queen's granddaughter, Princess Beatrice.

Pippa got engaged to James Matthews in 2016 with a ring worth an estimated $450,000.

Princess Beatrice has a round cut engagement ring worth A$140,000 which was given to her by husband, Edoardo Mapelli Mozzi.

** All values in AUD