List of the best, biggest diamonds in the world. Many of these diamonds are so highly priced because they are among the rarest diamonds, and others are expensive because of the shine or cut of the diamond. They say diamonds are a girl's best friend. But don't be fooled. Not all are created equal, so they come in a wide range of colors, sizes and prices.

Click here to check out the best diamond shapes . For more lists about luxury items, check out my guides to the Most Expensive Necklaces and Most Expensive Handbags