A stone that changes with the light.

An oval opal tone stone sits on a slim gold band. Under the afternoon light on your desk it runs pale pink. Under a bar's warm bulbs it goes lilac, with tiny flecks that seem to switch on. Prongs hold it low enough to sit against a plain band without rubbing. Small and quiet from arm's length, alive from up close.

The one in the stack that never comes off, and the one that gets you into conversations with strangers.