Caribbean quartz , 8mm,  15-17 inches 
"Caribbean Calcite is thought to bring about a sense of calm and emotional balance. It is believed to help us let go of worry and fear and allows us to settle into a more peaceful state. As a result, it is thought to help assist in deeper sleep."
"Using only local mining, once this resource is fully mined, it is expected to never be rediscovered, making it potentially rare, valuable and a future heirloom crystal."