AN: Marvolo Gaunt and the Mirror of Erised. This is a shorty, people. Sorry.
Money. That's what he saw when he looked in that mirror. Money, a dead daughter, dead Muggles, and he himself sitting on a grand throne surrounded by servants and precious gems. Rubies, emeralds, sapphires, anything you can think of.
Marvolo first glimpsed in the mirror at 13, and again at 26. He never got any of his wishes, other than the dead daughter.