Diamonds are valuable gems, and many people like to adorn themselves with diamond earrings, necklaces and rings. Couples looking to get engaged often try to find the best diamond they can afford, and rich people buy expensive diamonds and keep them as part of their investment portfolio.

There are many factors that contribute to the value of a diamond, including carat, quality, cut and color. The following are the 8 most expensive diamonds in the world, the majority of the diamonds are either owned by private collectors or exhibited at the museum.