Abacus Charm 14k Yellow GoldThis 14 karat yellow gold pendant takes the form of a miniature working abacus, measuring 19. 5 mm x 11. 9 mm. The tiny beads actually slide along the rods, giving the piece a kinetic, interactive quality. It's sized to work as a necklace pendant or as an addition to a bracelet. The polished yellow gold catches light nicely, and there's something satisfying about a piece of jewelry that moves. Small and lightweight, it won't feel cumbersome during