Map jasper, smoky quartz, blue Larimer quartz make up this beautiful stacker. 7.5 inches. Smoky quartz is an excellent grounding crystal. It neutralizes negative energies and detoxifies. Its exposure to natural underground radiation makes it one of the most powerful crystals for purifying the environment from electromagnetic stress. Map jasper is great for reducing nervousness. Jaspers are known as nurturing stones which bring gentleness, comfort and relaxation. They help the wearer feel peacefulness, happiness and completeness. They can provide a confidence boost and can help to dispel irrational fears.