The two symbols most important to the Baha'i faith are the nine pointed star, symbolizing spiritual completion:

and the "ringstone" symbol, so called because it is worn on rings by many believers:

The three horizontal lines of the symbol represent the three basic tenets of Baha' belief- the world of God, the World of God's manifestation, and the world of man. The vertical bar represents the connection of these worlds, and the stars flanking the glyph represent the Báb and Bahá'u'lláh, the founders and prophets of the faith.

Finally, the symbol of the Greatest Name:

This symbol is a phrase, "Yá Bahá'u'l-Abhá," or "Glory of Glories," rendered in calligraphy. "Baha," or glory, is also found in the name of Bahá'u'lláh.

Related Resources:

Jainism