Mica is a mineral name given to a group of minerals that are physically and chemically similar. Micas are all silicate minerals, known as sheet silicates because they form in distinct layers. Micas are fairly light and relatively soft, and the sheets and flakes of mica are flexible. The different types of silicates that are referred to as mica, are rated on the Mohs scale between 2 and 4 depending on which silicate. Micas are thought to promote wholeness of mind, body and spirit, as well as open spiritual self to higher realms.