[Voralphion]

After the War of the Wrath when Morgoth was defeated the Silmarils were won back by Eonwe. They were then stolen by the two remaining sons of Feanor and were lost in a crack in the earth and the ocean were they were deemed unrecoverable. The one in the earth was definately unable to be recovered by the Valar, but couldn't the one in the ocean be recovered by Ulmo. I would have thought that if they were important since they held the light of the Two Trees that the Valar would have told Ulmo to get the onte in the ocean.