Perfect Gift: an exquisite gift for best friends, families, gemstone collector, house warming gift on Christmas, Mother's Day, Thanksgiving Day, Valentine's Day, birthday, anniversary. Materials: Made of 16mm natural glossy Obsidian gemstone, with meticulous and superb handwork, is superior works. Handmade adjustable black strings. Rainbow Eyes Pendant Necklace: The obsidian bead is natural volcanic glass mineral. The stone here is large and black with two faint rainbows that can be seen upon the correct angle of strong light. The brighter the light, the brighter the eyes. When in weak light or indoor, it looks black. When in the sunlight or strong light, it shows its beautiful eyes. Try with your phone torch, you will see its colors. The eyes of obsidian can be green, blue, purple or yellow. Bracelet Design: The Protection bracelet beads are 10mm and the elastic nylon makes it neat and easy to wear, a perfect handmade bracelet for men and women. Obsidian Bracelet: It's believed that Black Obsidian is the positive powerful stone, wearing the Obsidian bracelet relieves an individual from stress and strain, soothes irritability, balances mood swings, dispels anger, rage, fear, and anxiety.