The infinity necklace can symbolize unity, eternity, empowerment or everlasting love. At its simplest, the symbol resembles a figure eight on its side, but it can also be portrayed by interlocking circles, or as an elaborate interlaced pattern.
The simple sideways figure eight symbol, known as the lemniscate, was introduced by 17th century English mathematician John Wallis to represent the mathematical concept of infinity, a quantity that's bigger than any number.
Celtic knot symbols, whether simple or intricate, have no beginning or end. They symbolize physical and spiritual cycles of birth and rebirth.
The ouroborus symbol, which can be traced back to ancient Egypt, depicts a serpent eating its own tail and represents rebirth, the cycle of renewal and immortality.
The infinity symbol has significance in the Tarot, appearing on the magician card as a halo floating above the magician's head. According to paranormality.com, the card can have numerous meanings, including power and possibility.
The United Nations Development Fund for Women (UNIFEM) partnered with Avon in a campaign to offer jewelry featuring the infinity symbol to denote women's empowerment and help end violence against women.