A quick transmogrification question

[Deleted]

When transmogrifying a weapon, do you have to one of the weapon you want for each transmogrification?

For example, my girlfriend wants to transmogrify http://www.wowhead.com/item=32471 (Shard of Azzinoth) for her Rogue, but she is wondering whether she would need two of that dagger, eg/ 1 for each weapon, or whether so long as you have the dagger you can use it for as many transmogrifications as you like.

PS/ We're also wondering if, despite the dagger being "one handed", if the "unique" quality/tag on the item would restrict it being transmogrified to more than one used weapon.

[Rivin]

You can use one weapon as a transmogrification source as many times as you want, including for both weapons you're dual-wielding.

As far as I know, "unique" tags are irrelevant.

[Bombkirby]

The item isn't "used up" when mogged, allowing you to mog several sets of gear using the same items for example. So that should answer your question.