The imprint of the Sigma Theta Tau seal is the lamp of knowledge, surrounded by a circle containing the name of the society, and the date of its founding, 1922.
The Key is the symbol of scholarship. The cup denotes the satisfaction of professional life. The circle of gold with its six stars represents our six founders. The letters in black - Sigma Theta Tau - represent our charge: Storga, Tharos, Tima - Love, courage, honor. The lamp is the lamp of knowledge.
The jeweled key features amethyst stars representing the founders in a circle of pearls or diamonds. The organization's colors are orchid and fuschia, and the flower is the orchid.