These Genuine Tiffany & Co. Black Onyx Ball Stud Earrings are a rare and exquisite piece of fine jewelry. Made of 925 sterling silver with a natural black onyx main stone, these earrings are hallmarked and feature a classic butterfly closure. The round stud style adds a touch of elegance, making them perfect for any occasion. Made in the United States by the prestigious brand Tiffany & Co., these earrings are a timeless and stylish addition to any jewelry collection.