Metal: Alchemia Lead Free, Nickel Free, Hypoallergenic. Baked lacquer finish to protect metal from turning or tarnishing Kyanite: 12mm Round. Earring Length from Round Post: 1 3/16". Stainless Steel Post. Due to the one-of-a-kind nature of the stone, the color and pattern may vary slightly from the image shown. Handcrafted and artisan made All pieces are stamped or hallmarked for authenticity