These particular clusters are mined in a very small area of the Colorado Rockies. They are powerful in keeping the spirit centered because they carry a special kind of energy that keeps all the energy centers within the body aligned, balanced, and in harmony with each other. Crystals from Brazil have the special quality of enhancing your ability to project energy over a distance. For example, in some of the above exercises, where you are sending healing energy to someone that is too far away for you to touch physically, hold a Brazilian crystal along with the other crystal to strengthen the transmission. These extremely rare crystals are hand mined high in the mountains of Tibet, and are carried down the mountainside by backpack.
Tibetan crystals are for protection.
Just having a Tibetan crystal close to you puts up an automatic shield against negative energy. It also helps shield you from other people's negative energy. This shield is even stronger if you do a centering exercise while holding the crystal.