Fortuna
The rock where I live is mostly granite (http://en.wikipedia.org/wiki/Granite) which is volcanic, very very old, and contains a large percentage of quartz, aka rock crystal in its pure form. I'll tell you something: there's nothing more soothing than laying down on a large, sun-warmed slab of natural rock by the sea this time of the year and listen to the wind in the grass and the seagulls crying – the Ice Age has made the rock so smooth and comfortable to lie on and still the surface feels rough and almost sandy, very safe and stable, but the energy is powerful, soothing, deep and full of life. I love it, just love it. I relax so quickly I almost fall asleep.
Then you can find larger bits of quartz and feldspar and sometimes small garnets. They are sometimes surrounded by granite, but sometimes you can find them lying loose on the beach when the rock around them has worn away.
Thanks!!!