Some species have fascinating inclusions in the shape of crosses. The German variety is also known as Stewartite, the Portugese as Tinsleyite, and Brazilian as Lindbergite.
Heals the abnormal fear of open spaces. The effect is temporary, and only lasts as long as you are wearing it. The basic issue underlying the fear will not be healed. A useful aid, in psychotherapy, to heal Agoraphobia.
REFERENCES & BIBLIOGRAPHY:
Campbell (1881) American Journal of Science: 22: 65.
Frondel, C. (1949) American Mineralogist: 34: 513-540.