Diamonds are forever but marriages are not, as Katie Holmes could probably tell you. Her ex-husband, Tom Cruise, got down on one knee with a stunning five-carat rock.

The center oval diamond is surrounded by another six carats worth of diamonds and has been estimated to cost anywhere between $275,000 and $1.5 million.

The couple split in 2012 when Katie started worrying that Tom would send their daughter Suri to a strict Scientology camp and the diamond hasn't been seen since.

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