Charlotte Casiraghi

Riding uses so many different muscles. I ride two to three horses a day, and I ride almost every day when I'm not working or traveling. You use your legs, your arms, your back. It's a very complete sport.

The price of diamonds can vary greatly depending on size, cut, color, and other factors, including whether they have a history. But because of the rarity of blue boron diamonds, they often fetch more money than gems of similar quality.