Meghan's ring famously features diamonds from the collection of Diana, Princess of Wales. Prince Harry had these precious family heirlooms set on either side of a large, square diamond that he personally sourced in Botswana.
In fact, this is a Duke of Sussex production all round as Harry helped design the overall look of the ring in conjunction with Cleave and Company. The prince spoke touchingly of how he planned the gem in the couple's engagement interview.
Recently, Meghan had the yellow gold setting made even more sparkly with the addition of smaller diamonds around the band, adding her own style touch to a ring that's already a royal classic.