The short answer
Three stones for the nightstand
A bedtime routine works because it repeats: same order, same small cues, lights a little lower each time. In crystal tradition, these three stones are the ones most often given a place in that routine.
The bedside classicAmethyst
Amethyst is traditionally placed by the bed — in the ChiFlow guide it anchors the Calm intention, described as a small marker that the day is over. If you only try one stone for your routine, this is the usual first choice.
A simple way to use it: Keep it on the nightstand where you will see it as you turn the light down. Let it be the last thing in the routine: everything after the stone is rest.
The night stoneMoonstone
Moonstone has been linked with night and natural cycles in crystal lore for a long time, and people often choose it when their evenings feel out of rhythm. It is the gentlest-looking of the three — soft light, no sharp edges.
A simple way to use it: Place it beside the bed during your wind-down and pair it with one fixed habit — the same drink, the same page of a book — so the cue and the habit reinforce each other.
The slow-down stoneHowlite
Howlite is the stone crystal practice reaches for when the day has been fast and loud. In a bedtime routine it plays the role of a brake pedal: a reminder that nothing else needs to be started tonight.
A simple way to use it: Hold it while you write tomorrow’s first task on paper — the rehearsal your mind was going to do at 2 a.m. happens here instead, on the page, before bed.