DIY Jar Necklaces + Supernatural Inspired

I've been wanting to make a supernatural inspired project for a while, not only because it's one of my favorite shows, well maybe that's the main reason why, but it also makes for a great themed jewelry.
While doing some tidying up of my supplies I also found the tall and skinny jar that I'm using for the salt necklace, sadly it was missing a lid, but I found an end cap on my local craft store that matches the size perfectly. Of course, I could not only make one necklace, so I also ended up making a glittery one.

If you made one of these what would you put inside?
Talk to you soon,