Number_6
Well-Known Member
*SPOILER ALERT*
It is possible that the horcrux that was replaced has already been found by them, but they just haven't realized it yet. The note that was left with the replacement one was signed "R.A.B." Could be Regulus Black, Sirius' brother, who had become a Death Eater and was then killed. A large amulet that could not be opened was found in OotP while the Order was at Sirius' home. Could be the horcrux...
It is possible that the horcrux that was replaced has already been found by them, but they just haven't realized it yet. The note that was left with the replacement one was signed "R.A.B." Could be Regulus Black, Sirius' brother, who had become a Death Eater and was then killed. A large amulet that could not be opened was found in OotP while the Order was at Sirius' home. Could be the horcrux...