Choose one stone you would like to carry, hold or leave beside a notebook. Rounded prehnite, an amethyst thumb stone and a pink heart offer different outlines and surfaces to explore. If your birthday bracelet introduced a particular stone, start with the same listed name here. Carry a piece separately so it does not knock against keys or other stones. Read the individual listing for material, size and what is included; stone patterns and individual outlines can vary between pieces.