Previous Next PEARL FACTS Pearls are the only Gemstone to come from a Living Creature. Pearl oysters are male and turn into females around age 3. The earliest record of discovering pearls as a precious jewel is from Mesopotamia dated to around 2300 B.C. Natural pearls are considered as one of world’s rarest jewels. The most expensive pearl in the world is valued at $100 million. It takes 6 months for a pearl to begin forming. An estimated 99% of pearls in the current market are cultured.