Metal: Alchemia Lead Free, Nickel Free, Hypoallergenic Baked lacquer finish to protect metal from turning or tarnishing Stone: Fossil Shark Teeth Due to the one-of-a-kind nature of the teeth, the color and shape pattern may vary slightly from the image shown. Shark Tooth: Approximately 36mm x 27mm Adjustable 7mm Ring Shank Fits Ring Sizes: 5-10 All pieces are stamped or hallmarked for authenticity Casual day and evening wear Metaphysical Properties: Promotes strong bone growth