After a whirlwind romance and months of speculation as to when, rather than if it would happen, British Prince Harry and American actress Meghan Markle have finally announced their engagement. The ring, which features a stunning 18 carat gold band adorned with a trilogy of diamonds, was designed by Prince Harry. The centre diamond appears to be a cushion cut of between three and four carats and was sourced from Botswana, where Harry has spent a lot of time and where he first took Meghan on holiday. The two side stones, estimated to be just under a carat each, are from his late mother, Diana’s jewellery collection. This makes it virtually impossible to put a value on the ring. This is not the first time the late Princess Diana’s jewellery has been used by her sons. Prince William used her engagement ring to propose to Kate Middleton in 2010. The ring features a 12 carat sapphire surrounded by 14 diamonds. It was bought by Prince Charles for £28,000 at the time and is now worth around £300,000, proof that diamonds not only hold their value, but increase substantially over time. Of course it certainly helps if they’re associated with royals or celebrities!