Made in South Africa, the Pink Star Diamond fetched $83 million in a 1999 auction.
The Graff Diamond Ring, valued at $80 million, has passed through many hands.
One of the most gorgeous rings ever, the Oppenheimer Blue, was sold for $57.5 million.
The Blue Star Ring made history after securing $48.4 million in an auction.
The founder of Graff Diamonds had acquired this 24.78 carat pink diamond ring for $46.2 million.
In June 2016, a 24.18 carat Cullinan Dream Diamond Ring fetched $25.4 million in an auction.
Cartier's Sky Blue Diamond Engagement ring was purchased for $25 million at auction.
This unique Perfect Pink Diamond Ring is valued at $23.2 million.
An Asian businessman acquired Bulgari's 1972 Blue Diamond Ring for $18.3 million during a 2010 sale.
Sotheby's auctioned this 100 carat Vivid Yellow engagement ring in 2014 for $16.26 million.