Mariah Carey's 35-carat engagement ring from Aussie businessman James Packer is believed be the most expensive one in history. What is its estimated value?

Answer $10 million

Diamonds are forever. Unfortunately, engagements are not: Mimi and her beau went their separate ways only 7 months after he put a on ring it. She promptly hawked the sparkly bauble at a Los Angeles jeweler.

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