This flat freeform stones (about 3-4cm in diameter and about 1cm thick) are ideally used for body placements, chakra work etc. For extended treatments they can be fixed to the body with a Band-aid or can easily be carried along as a "pocket-stone".
Each stone preformed by hand then tumble-polished. Sold in units of 0,5kg (app. 15 to 30 stones / sales unit).