Mystical Wonders Discussion Group This is the #1 spiritual / mystical group in the world that encompasses literally all fields at one forum with tons of archived discussions and thousands members worldwide! Existing since 2003.
I get mine on ebay. There are better sources if you do some good searching. It definitely made a difference for me. It caused the beginning of my spiritual journey. The first three nights I had dreams about traveling at night without lights. Car, motorcycle, and bike. It meant that I was undertaking a journey without guidance I assume. About a year later I stumbled onto my guidance.
For me there was a bit of euphoric feeling in the beginning. It has interesting effects considering it is just minerals.