OX takes a familiar idea - diamond jewelry - and gives it an entirely new rhythm. Designer Jessica Busiashvili reimagines the hourglass as a series of rotating, interlocking links in her signature Ourglass collection. As the links turn, the diamonds reveal themselves from different angles, creating a wonderfully fluid play of light. The engineering is ingenious, but the effect is beautifully effortless. Sculptural, tactile, and a little unexpected, these are pieces you really need to see in motion. K.J.