I see thats good to know.

Yeah and I got effects from the same leaf for a couple of days as well before I decided to bury the crumpled up leaf ceremonially lol.

The amethyst I use is a reasonably sized cluster. Actually amethyst is the birthstone for my sign - Aquarius which is why I was first using it. But my brother also tried using it and had noticeable effects and he'a a Capricorn. Also another thing you can do that made my dream absolutely crazily vivid and powerful was that I used to sometimes just tie the amethyst around my forehead as I was concentrating to do some work or in meditation and then later at night I would end up having very noticeable differences in my dreams. But also with anything try it out, but also don't exhaust it and give a couple of days break, etc.

Hope you can experience it. I think there's an old thread in here about gemstones which might also be interesting to have a look at.