[Balanor]

From the last server update:

-There is an unbalancing effect when PCs possess 2, 3, 4, 5+ copies of special quest reward items like Sharken's Stone of Missiles, Torm's Stone Hand, etc. As a result there is now an ever increasing chance that the longer they carry multiple copies of those items, the magic of the extra copies will fade or become unstable - causing them to disintegrate

When they are consumed you get the following message:
"The magic of "+sItemName+" has been utterly consumed and it has disintegrated."

Both items will not be consumed though - only the additional copies if you are carrying more than one.