Size of the amethyst cave approx. 12 x 11 cm, weight approx. 2.6 kg.
To cleanse amethyst, the stones in question simply need to be placed in an amethyst gland or on a piece of amethyst gland. The energy radiating from the crystal tips penetrates the stones placed on it with the "cleansing information" so that all foreign information is released.
According to Michael Gienger, two to three hours are sufficient if the stones were previously discharged under running water. If this is not possible (e.g. with stone chains), eight to twelve hours is the minimum required. It can also be longer, there is no such thing as "too much"!