that depends on how many pearls or what the quality of a pearl is a pearl necklace might cost around $ 100 with 15 pearls on the necklace which averages at a price of about $ 7 per pearl that depends on how many pearls or what the quality of a pearl is a pearl necklace might cost around $ 100 with 15 pearls on the necklace which averages at a price of about $ 7 per pearl minor edit