The crescent moon has become one of those jewelry motifs that has outlasted the trend cycle that introduced it - it has moved from celestial-trend to permanent vocabulary, probably because the shape itself is inherently interesting: the asymmetric curve reads differently depending on orientation and chain length. Rachel Zoe's version is CZ-set, the stones covering the crescent form and creating a sparkle piece that reads as a statement without being heavy. Set in 14K gold over sterling silver on a 16-inch cable chain with lobster claw clasp and extender. At 16 to 18 inches adjustable, the moon sits at or just below the collarbone - the position that allows it to be seen without competing with a neckline.