If Regulus Black's locket was different from Salazar Slytherin's Locket then why didn't Albus Dumbledore realize that before he died? C.Syde (talk | contribs) 08:48, May 19, 2014 (UTC)

He was already too weak. Then the fight against the Inferi and when they came to Hogsmeade, Madam Rosmerta told them of the Death Eaters in Hogwarts and they flew to Hogwarts as soon as possible. There was no time to have a long look at the locket for Dumbledore.  Harry granger   Talk   contribs 14:24, May 19, 2014 (UTC)

I was going to say! I would have expected better of a genius like Albus Dumbledore. But I suppose he never suspected that it would be a fake, in addition to the information you mentioned.  C.Syde (talk | contribs) 06:50, May 20, 2014 (UTC)