Iolite is blue-violet, but you have to turn it in the light to see it fully. From one angle it looks nearly grey. From another the blue lifts out of the stone like weather clearing.
People reach for iolite when they want to see something more clearly. Not in a mystical sense, in a practical one. When you've been going in circles on a decision, when a situation keeps looking different depending on your mood, when you want to sit still long enough to know what you actually think. Keep it on a journal, on a bedside table, in the pocket on a day you're trying to make a real call about something.
Also called cordierite. A magnesium iron aluminum silicate that shifts color depending on the axis of light, an effect called pleochroism.
You'll be sent the one intuitively chosen for you.