Modern stone healing therapists use Opalite for improving sociability, a good contact to one's environment and also to dissipate fear of contact.
This flat freeform stones (about 3 - 4cm in diameter and about 1cm thick) are ideally used for body placements, chakra work and other treatments. For a longer use, 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 0,5 kg (app. 20 to 30 stones / sales unit).