TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
PROBLEM: Category: STATE CAPITALS 
Clue: While Portland is Maine's main city, this is the capital

SOLUTION: augusta

PROBLEM: Category: GET AN EDUCATION! 
Clue: God willing, you'll learn enough about religion to know this word defined as belief in a single god

SOLUTION: monotheism

PROBLEM: Category: I AM A ROCK 
Clue: Kimberlite, a variety of peridotite, yields this precious gem in Arkansas & South Africa

SOLUTION:
diamond