These 2MM April Crystal Birthstone studs are 24K gold plated, hypoallergenic, and ideal for sensitive ears. Made in the USA, they offer safe and hygienic wear. Key Features Hypoallergenic Ideal for everyday wear Made in USA Allergy-free Safe, hygienic, nickel-free Medically sterilized for safety Suitable for sensitive ears Key Materials: Surgical Steel base; 24k Gold Plating; Crystal gemstone (April birthstone); Sterile packaging.Studex: Earrings for sensitive ears, known for hypoallergenic and medically sterilized products.Piercing Stud: Requires use with a Studex piercing instrument by a certified technician.Medically Sterilized For Safety.