Kate Middleton’s most expensive piece of jewelry was originally gifted to Queen Elizabeth nearly 80 years ago.

Jefferson’s diamond necklace is as exclusive as it gets ... This grill, which costs around $200,000, features custom-cut ...

It features 13 emerald-cut diamonds and a pear-shaped centre diamond and is rumoured ... In February 2014, the necklace was worn for the first time by the Princess of Wales for an event at the ...