Mary-Kate Olsen's Vintage Cartier Engagement Ring

Mary Kate is sporting an absolutely incredible vintage Cartier ring given to her by French banker boyfriend Oliver Sarkozy - obviously he as great taste because the ring is unlike anything. 

Its been discovered that the ring is a vintage Cartier piece from 1953 and features a four carat diamond framed by 16 sapphires and petal set with  single cut diamonds. Priced at $81,25o, it was bought at a Southeby's auction on February 6 and originally belonged to a Tennessee based jewellery collector. 

Here she is arriving at the Louis Vuitton Autumn/Winter show with her new ring.

Source {fashiontelegraphuk}