Eternity Knot Necklace

Tie something that stays tied.

Two fine chains cross into a single loose knot and then run on as one, and because the knot is part of the chain rather than a charm hung off it, it never flips backward while you sleep or twists under a shirt. You towel dry your hair in the morning and it is already sitting straight. Up close it reads as a detail. From a step back it reads as a good chain.

Knotted once, and it holds through everything after.