1. We initially plate with 18K gold. Afterwhich, they are given a lifetime protective finish Immediately after the process of plating. Nickel-free, lead-free, and hypoallergenic. 2. Classic and timeless, our best seller coin necklace is an elegant finishing touch for any look. This feminine, collectible piece makes a most romantic little gift. 3. A perfect gift to your Mother, Daughter, Girlfriend, Wife, Bridesmaid, Granddaughter, Niece or Friend. They are well-suited for any gift-giving occasion and are perfect gifts for yourself or someone you love.