Rhyolite -Connecting you to mother nature, to help heal the earth. Rhyolite has a soft energy, and will help draw more positive people into your life.
Flat palm stones are also ideal for Meditation. 4cm by 3.5cm Size and photo are a guide.
Disclosure-If you're worried about your health always see your doctor first. There are no guarantees with crystals, but they may enhance your life.