The name apophyllite is derived from the Greek  apophylliso, meaning "it flakes off", a reference to this class's tendency to flake apart when heated, due to water loss. These minerals are typically found as secondary minerals in vesicles in basalt or other volcanic rocks.  Apophyllite helps to calm an anxious mind in times of stress. By working to absorb negative thought patterns, apophyllite helps sort out problems in a more productive way.