clearing or cleansing stones:

smudge the crystal (e.g. with sweetgrass, cedar, sage, incense etc.) this method has been used for centuries by native american and native african tribal cultures

-place the crystal on a large crystal cluster for 12-25 hours.

-surround the crystal with a visualized white or golden light, intending any present negativity to be transformed to positive light energy. concentration and intention must be maintained.

-move a tape de-magnetizer up and down the length of the crystal. removing and dissipating the negative vibratory essences.

all excerpts above by LOVE IS IN THE EARTH by MELODY

-place your item on a bed of dry sea salt.

-place your item in the freezer over night, to clear accumulated energy