Where can I find fact vs. fiction on Titanic the movie?

Maccabee asked: I just saw the movie and I want to know where I can find what really is fictional and what is factual? Is that story about the diamond necklace factual? Is there a website talking about what is fact and what is fiction? Thanks.

Was there really a necklace/diamond on board the Titanic like the one depicted on the movie ?

Jenn asked: Was the whole thing about the valuable necklace/diamond depicted on the Titanic movie actually true or just a story made up for the movie? Is there any documented evidence of a necklace like that actually being on the Titanic?

Would you throw that Diamond Necklace into the ocean?

Boba Fett asked: If you were that old lady in the Titanic Movie would you throw that diamond necklace into the ocean?