'Now anyone with a nickel allergy, eczema or sensitive skin concerns can wear fashionable nickel-free earrings when wearing Blomdahl caring earrings. For those exquisitely sensitive to nickel, Blomdahl Medical Plastic earrings contain 0% nickel. All earrings are bezel set and all stones are Swarovski crystals. Acrystal heart-shaped earring adds a sweet, loving touch to any wardrobe.