By Åse Anderson in London
Similar to a pear-shaped diamond with a cleft cut into the top, the heart is actually one of the most complex diamond shapes to cut as it requires sacrificing carat weight to create the intricate shape. The proportions must be just right to ensure the heart is symmetrical - if it is cut too narrowly the diamond will look stretched, while if it is too wide, it will look bulky.
The heart-shaped Chopard diamond engagement rings from the Passion for Happiness collection are the apogee of romance and the perfect way to celebrate your love and commitment. Choose a delicate heart-shaped diamond on a narrow band glittering with pavé diamonds or go for the bolder option with a 5.63ct heart-cut diamond surrounded by smaller stones.
Messika's heart-shaped diamond engagement ring is the ultimate in femninity, starring a rare pink diamond. An even more colourful alternative to a white diamond is Graff's heart-shaped sapphire engagement ring, which puts a more contemporary spin on this unashamedly pretty cut.
UK Jewellery Designer of the Year 2013, Sophie Harley, who is based in London, has given her heart-shaped diamonds wings to celebrate the brand's 25th anniversary. Her heart-shaped diamond ring has got plenty of sexy style, bringing a tough new attitude to this traditionally girlie diamond cut.
Finally, if in any doubt, a classic Tiffany engagement ring with a single heart-shaped diamond shows off this most romantic of diamond cuts to perfection.
Chopard Passion for Happiness diamond engagement ring featuring a 5.63ct heart-cut diamond surrounded by smaller diamonds.
Chopard Passion for Happiness diamond engagement ring featuring a delicate heart-shaped diamond on a narrow band glittering with pavé diamonds.
Messika heart-shaped pink diamond engagement ring set with rose gold prongs and a pavé diamond band.
Sophie Harley 2.5ct heart-shaped diamond ring set in yellow gold with additional diamonds on the shank.
Graff Diamonds heart-shaped sapphire engagement ring featuring diamond-set shoulders.