A stone breaks light into pieces. A flat polished face does the opposite: it keeps the light whole and throws it back in one go, so the piece flashes as you turn your head instead of glittering while you hold still.

Four straight sides and no stone. A square belongs to nobody in particular, so it suits any ear, and it takes being repeated: two or three through the same ear hold a cluster together.

The Square labret is a flat polished square in 14k gold, set with no stone.

Set it beside a Swirl labret, four straight lines against one curl.