I’m actually against the whole idea of chopping crystals up into little pieces. 😱 Crystals are “living things.” They have a beauty and functionality that is inherent in their original condition and size. Some of the most beautiful and effective crystals I use in Brilliant Pebbles are rough (natural) medium to large size crystals. I use tumbled stones, too. I have three sizes of Brilliant Pebbles, each size intended for a set of applications - each size contains a number of crystal types. As I mentioned somewhere along the line, the use of different crystal types together in the same device extends its effective bandwidth. Thus, if you like two particular crystal types, put them together and they will probably be more effective.
The size of crystals required for certain applications is a function of energy problem. Thus, in room corners, where one encounters extremely high sound pressure levels, small or chopped up crystal bits just won’t cut it, so to speak. The same goes for using crystals on the top of speaker cabinets or the top of tube traps, where large crystals are required. The smaller Mikro and Mini Brilliant Pebbles are great on glass windows and doors, on walls, in proximity to small vacuum tubes, on top of CD players directly over the spinning disc and other applications.