Value: $4.6 million
When Prince Rainier III of Monaco decided to propose his wife, Hollywood star Grace Kelly, he opted for an exquisite Cartier diamond ring. The 10.47 carat ring with emerald-cut centre was surrounded on both sides by two stylish diamond baguettes. The ring has been valued at a staggering 4.6 million dollars and was a fitting ring to sit on the finger of one of the most well-known and famous leading ladies of Hollywood, who was in her own right quite stunning too.
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