Elemental savants study the basic building blocks of existence - air, earth, fire, and water - learning to harness their powers. Eventually they transcend their mortal forms and become elemental beings.
Elemental savants often begin their careers as individuals intrigued by one or all of the classic elements. Before they ever take levels in the prestige class, these spellcasters typically find themselves drawn to spells of a particular energy type. These spellcasters find satisfaction in the unleashed purity of the elemental energy forms, and they become elemental savants to grow closer to the element that becomes their favorite.
Earth Savants study the earth and acid, and can wield it through spells as it it was a part of their being.