The prototype of the Heart of the Sea necklace in the Titanic is the famous Blue Diamond of Hope.
At that time, the film crew wanted to lend the real guy of "Blue Diamond of Hope" to the museum to shoot. But because it was too valuable, the museum refused, and the crew later used tanzanite to create the "Heart of the Sea".
This rare blue diamond comes from India and is blue because it contains boron impurities in the lattice. According to research, it was first formed 1 billion years ago in a formation 150 kilometers above the ground and brought to the ground by volcanic eruptions.
Originally, the stone was 112 carats and was smaller every time it changed hands. For example, Louis XIV of France ordered that this blue gemstone diamond be polished into a heart-shaped diamond weighing 67 carats.
It wasn't until 1997 that the GIA identified it as a 45.52 ct blue diamond with a natural gray hue in VSI. clarity, Fancy Deep blue.
It was later surrounded by platinum, 16 colorless cushion and pear-cut diamonds, and a chain of 46 colorless round, pear-shaped diamonds to form a distinguished necklace.
