Staurolite

Staurolite is an iron aluminium nesosilicate mineral, reddish brown to black, with a white streak; Wikipedia says it often forms cross-shaped twins. Its name comes from the Greek word for cross, Cunningham says. Cunningham gives the folk names Fairy Cross, Fairy Tears and Staurotide, all four elements, and says three United States presidents carried it as a luck charm. He says that perfect equal-armed crosses are the favoured ones, worn or carried for protection against negativity, disease and accidents, to draw wealth and to energise the sexual drive; he sets a ring of staurolite in electrum for control of the elemental forces and gives an elemental candle spell. Hall describes a brown stone, also called the Fairy Cross, and associates it with protection, communication between the planes, ancient wisdom and grounding energy. Her claims about stress, smoking and fever are her own and are not vouched for here.