Kate Middleton has been paying secret tribute to Princess Diana [Getty] Kate Middleton - who is four months pregnant with her third child - has an entire jewelry collection inspired by Prince William's mother. Princess Diana loved sapphires and it's a well-known fact Kate's engagement ring - which features an oval 12-carat Ceylon sapphire surrounded by 14 solitaire diamonds set in white gold - once belonged to the late Princess.
Source: OK
