Gemstones

Top 10 World’s Rarest & Most Valuable Gems

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TYRONE SIU/Reuters/Corbis

Throughout history, humans have adorned themselves with jewelry - first made from bits of shell, bone and sparkly rocks, and later, with gems set in copper, silver and gold.

It takes millions of years for crystals to form in nature, and only a fraction of those will ever be found, mined, cut and sold as gemstones. The value of gemstones depends on many factors, including rarity, quality, setting, and even politics. Dig in to the world of incredibly expensive jewels with our rundown of ten of the world's rarest and most valuable gemstones.

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