I'd think Crystals would be the right section since it would be possible to investigate not just properties connected with divination, but also with things like dreaming (lucid or otherwise), healing, astral travel, meditation, communication with guides, etc.
But anyway, if you're suggesting a sort of "Crystal Study Group," I could be very interested -- I've been fumbling my way through so far, but I'm very new to crystals, and I find it frustrating that every resource I check seems to have a different take on any given crystal! I mean, there are some things that are generally held, but there's a lot of variance from one opinion to the next, so I think personal experimentation is critical. It might be cool and illuminating and inspiring to post experiences with some like-minded people who are also exploring. I like your idea about extending each trial period to one week, too -- so far, I jumped into buying a bunch of different crystals, and I've been cycling through them one night at a time, with maybe an extra evening session of trying to use them in one way or another, too...but that's not much time, and a full week might be a much smarter way to really get the feel for a given crystal.
If a few people would be interested in pursuing this, I'd be game!
