The top of this pendant unscrews and the vial can be filled with a liquid of your choice. Wear as a necklace or use as a pendulum.16inch chain and dropper included. Available in a silver finish. Aquamarine is known as the stone of Courage & Protection.  It can help open your Throat Chakra, enhance spiritual communication, and clear communication blocks. Aquamarine helps to promote verbal self-expression and to help overcome judgment of others. This is a great stone for students.