Natural pearls are likely the world's rarest gems. Nearly 100% of the pearls on the market today are cultured; they have been grown on pearl farms around the world. But there was a time in history, only about 100 years ago, when pearls had to be found, not grown. Today, only a handful of natural pearls are found each year. This collection of natural pearl earrings features a sampling of those rare, historically sought-after gems.