"'One whose hand,/Like the base Indian, threw a pearl away/Richer than all his tribe'"

This quote is taken from Act 5, Scene 2 of Shakespeare's 'Othello'.  It is part of his final speech , before he stabs himself.  The words quoted here describe his beloved wife, Desdemona, whom he has just killed after being manipulated into believing she was unfaithful to him; it is upon discovering the truth from her maid, Emilia, that he resolves to die.

Here is Laurence Fishburne delivering a fine version of the speech: