My sister gave me an amethyst cluster as a half-joke gag gift after I complained for the tenth time about not sleeping. I laughed, said thanks, and put it on a shelf where it sat for probably two months untouched.
I moved it out of boredom, not belief
One night I was rearranging my nightstand and needed something to fill the empty corner. The amethyst ended up there mostly by accident, not because I'd decided to try anything.
What I noticed after a week
I didn't feel a wave of calm or anything dramatic. What I noticed, a week or so in, was that I'd stopped picking my phone back up after I'd already turned off the light — a habit I hadn't even realized I'd been trying to break.
I'm still not sure how much to credit it
Amethyst is classified as an absorber, traditionally associated with pulling in mental noise rather than adding anything. I can't prove it did that for me specifically. I can tell you the nightstand felt different once it was there, and I never moved the stone back to the shelf.
If you've got one sitting somewhere out of sight, it might be worth giving it the spot right next to where you actually try to rest.