Ravenclaw's Computer

Harry's discovered the legendary Ravenclaw Diadem in the Room of Requirement and has come to a startling conclusion that it's actually a 10th century magical version of a computer/pensieve. The problem is, it's corrupted by Voldemort's Horcrux. How can he and Hermione Granger get rid of the Horcrux while maintaining the beauty of such a ancient treasure?