The Natural Diamond Council has released the results of a recent survey on engagement jewellery trends. | Source: Elle

Lisa Levinson, Natural Diamond Council spokesperson

Duchess of Sussex Meghan Markle's ring features a cushion-cut centre stone between two smaller diamonds from Princess Diana’s collection.

Actress Mila Kunis’ round brilliant diamond engagement ring.

Singer Adele’s pear-shaped piece.

Kate Middleton’s oval blue sapphire centre stone with a diamond halo surround.

Zendaya’s east-west emerald-cut diamond ring.