High-quality, 1 carat diamond rings have proved to be the most sought-after diamond engagement ring that can prove one of the ...

The priciest offering at this writing is a $319,999.99 ring set in platinum with a 1.54-carat pink diamond rated with VVS1 clarity. For comparison, a solitaire diamond ring at Tiffany & Co.

Kate Middleton now holds Princess Diana’s famous engagement ring. Inheriting the piece from his mother, William proposed to Kate with the ring as a way to carry on his mother’s legacy and keep her ...