I am, among other things, a crystal healer, so I ought to have known ... but we are all human, prone to forgetting the wonderful tools and techniques we learn along the way.
I've had a painful leg as a result of some heavy lifting. Arthritic, I suspect. At times I've had to walk with a stick. Various ways of trying to relieve it didn't work all that well. Moving around helped a bit. It was always worse if I'd been sitting awhile, and worst of all first thing in the morning, after lying in bed all night.
On impulse, two mornings ago, I picked up and put around my neck a clear quartz crystal on a cord, which I usually use as a pendulum. I have learned to follow my strong impulses, but didn't connect this with my leg in any way — until I realised, that evening, that I had been pain free all day. So I kept it on while I slept, and woke up still pain free. I haven't taken it off since!
I do get a slight twinge if I move the wrong way; the underlying condition is obviously still there, and I am taking steps to address it. (Getting a scan, booking in for physio...) But I can function normally and I don't need to walk with a stick.
It's just a tumbled crystal in a metal coil, but boy is it powerful!
Clear quartz is of course the all-purpose healer in the crystal world.