Sisters Mobius Necklace"My sister, my friend through thick and thin" Keep a beautiful sentiment close to heart with this unique and exquisite design. The shape is known as a Mbius strip, after the German mathematician August Ferdinand Mbius (17901868). It represents the seeming paradox of a plane without end or one of infinite length. As such it became a symbol for infinity, an appropriate form for this heartfelt expression, at least as old as Geoffrey Chaucer's Canterbury