The stone is 3.8 cm long The size is 19.84 mm UK T 1/2 US 10 Electroformed Jewelry is created using chemistry and electricity, This Electroformed copper polychrome jasper ring is one of a kind and unique in all ways, you will recieve the Electroformed copper ring from the picture. I can make similar rings in various sizes. Polychrome Jasper is a crystal of exuberance, physical energy, vitality, and vibrance. This is a stone of Fire Energy -- the energy of heat, action, emotion and passion -- of ideas, of concepts, and sex. It is alive, potent, and if not used carefully, destructive. We all need the heat, passion, and life giving energy of the fire element. Embrace the bright colors, feed from their energy and reenergize your life and passions.