The Titanic Necklace, also known as the Heart of the Ocean, gained fame through James Cameron's blockbuster film "Titanic." In the movie, it was a fictionalized version of a real diamond and sapphire necklace that supposedly sank with the Titanic in 1912. However, the necklace is purely a creation of the film's imagination.

The necklace in the movie was a blue diamond surrounded by smaller white diamonds, and it played a significant role in the storyline as a symbol of love and loss. Since the film's release, replicas and similar designs have been produced, becoming iconic in their own right. The allure of the Titanic Necklace continues to captivate people's imaginations, despite its fictional origins.