Serpentine reduces negative forces. It helps in removing all the blockages which disrupt the mindset and deteriorate health. In medieval times this was the stone used while taking out the snake venom in case there had been an incident of snake bite.
Serpentine helps to balance mood swings, it is calming in cases of nervousness and stress, and it protects from negative energy effects. It's a good cleansing stone, it detoxifies the blood and the body.