5. Bleu Royal - $43.8 million The Bleu Royal is another most expensive ring in the world. It is a 17.61-carat vivid blue pear-shaped Type IIb diamond. This ring also has a platinum and 18K rose ...

Celebrities are known for going all-out for love. Just look at Orlando Bloom and Katy Perry. The "Pirates of the Caribbean" actor and "Teenage Dream" singer got engaged six years ago, on Valentine ...