Sodalite tumbled stone
"Sodalite unites logic with intuition and opens spiritual perception, bringing information from the highest source down to the physical level. Sodalite stimulates the pineal gland and the third eye. It is a highly effective stone to use to deepen meditation. When in a Sodalite enhanced meditation, the mind can be used to understand the circumstances in which you find yourself. Sodalite instills a drive for truth and an urge toward idealism, making it possible to remain true to yourself and stand up for your beliefs.
Sodalite can clear electromagnetic pollution and can be placed on computers to block their emanations. It is helpful for people who are sensitive to electromagnetic smog. Sodalite can eliminate mental confusion and calm the mind." The Crystal Bible by Judy Hall