In holistic medicine, turquoise is believed to have a caliming effect. It is often used to treat patients who are prone to panic attacks or mania. Many psychiatric hospitals paint their walls turquoise or other shades of light blue to calm their patients.
Turquoise is also closely related to water. This is where the shades aqua and aquamarine get their names. The Carribbean is often referred to as 'The Turquoise' because of the shallow waters that take on the color in sunlight.