I think it’s black tourmaline. The second photo you posted looks exactly like a sample that I have, and like the photos in a book I have by Scott Cunningham who was a brilliant stone/crystal expert. You can ward off nightmares, and encourage good sleep by putting it under the pillow, or (this is something I didn’t know!) if you are afraid of being found out and need to hide your spell work, you can put under the mattress for better hiding. Back in the day, people frowned on that sort of thing, so you had to hide things you used in interesting ways. Black tourmaline is very good for insomnia as well. I think it’s wildly interesting that Nana was into ‘witchy’ things! Did she ever talk about it at all, much? Do you feel like she handed down her skills to you, ever? You should read some books and articles. Maybe you found this for a reason, to encourage you!? Good luck!

Looks like caca

Everyone can figure out what they think it might be, but to me it looks like a turd. And that’s that!!

How hard is it? Is it like rock hard, a stone? Or dried hard, like a food that’s been dried for a really long time? I ask because there are some stones and crystals that witchy people put under mattresses for different things. If you found this at the head of the bed, it could be a charmed crystal to ease nightmares, stimulate fortune-telling dreams, or encourage a dream of a potential lover. I don’t know how old Nana was, but every body dreams of love. If you find crystals at the bottom of the bed, it’s like that she was wanting to go somewhere, even in a trance or dream, but her feet needed the charm. I’ll look through my books and see if I can find anything similar. I don’t recognize it right off…

I’m 80 and I’m half Hungarian and half Belgium and this is the first time I have ever heard anyone use the word caca. We used to call it that back when I was a kid. I love it😊

Well my mother has taken care of people on their death beds for a long time. People who are dying have a unpleasant. smell about them. They would place coal underneath the bed which would absorb that smell. Could this be coal or charcoal?🙏

I think it's HASH

Cancer is so painful that people would do anything to try to ease their suffering. It’s sad that you’re gonna start calling her witchy and all that when you have no idea the trauma she went through probably all alone.

Bible says witchcraft is wrong

Too me smoke blunt roaches weed marijuana to me Sorry I mean wth Old burnt blunt No disrespect at all Sorry for your loss