Among the most well-known lockets is the one retrieved from The Titanic—not exactly the heart-shaped blue diamond necklace that went by the “Heart of the Ocean” in the famous fictional love ...

The large heart-shape diamond now worn by Lauren Sánchez ... like the Honor’s Baby Blue Necklace ($789), named for Ms. First’s goddaughter, which has a 1.8-carat blue topaz heart on ...

A 4.05-carat heart-shaped fancy blue diamond pendent necklace (about $1 million to $1.6 million) will also be on the block, as well as an 5.83-carat oval fancy light blue diamond with heart-shaped ...