Louis XVl wore a fabulous stone that was called the Blue Diamond of the Crown which disappeared in 1792 about the same time old Louis lost everything from the neck up.
13 seconds sound clip from the Titanic (1997) movie soundboard.
You can hear this line at 00:15:25 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, yes.
- Have to have my pictures when I travel.
- Can I get you anything? Is there anything you'd like?
- Yes. I would like to see my drawing.
- Today it would be worth more than the Hope diamond.
- It was a dreadful, heavy thing. I only wore it this once.
- You actually think this is you, Nana?
[...]