The sealed sack is for a quest in Steamfont that yields a 5 charge 150 magic damage absorb shield potion.
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Pristine Ore Samples (Normal): This quest starts in Steamfont with Metallurgist Mirakzin, a gnome who
wanders from the entrance to Ak'Anon out around the kobold camps north of
the druid rings.
You say 'Hail, Metallurgist Mirakzin!'
Metallurgist Mirakzin says 'Quickly! I need your [help]!'
You say 'What help?'
Metallurgist Mirakzin says 'I just received a sample of a new ore mined by
the pirates of Broken Skull Rock. Unfortunately, it is not pure enough to
conduct the needed experiments. I need several Pristine Ore Samples from
within the mines. Are you willing to help me in return for a [favor]?'
You say 'I will do you a favor.'
Metallurgist Mirakzin says 'Bah! Don't worry. You'll be rewarded well.
Take this Sealed Sack and get three samples. Make sure to combine them. I
wouldn't want the samples to oxidize like the last ones.'
At this point he hands you a 4-slot sack. You must go to the Torgiran
Mines, obtain three Pristine Ore Samples, and combine them in this sack.
The result is a Sealed Ore Sack that you return to Mirakzin.
Metallurgist Mirakzin says 'Hmm. It LOOKS like the samples survived. I
will, however, have to test them. But you've done well I suppose. Here.
Take this as payment.'
Returning the samples will get you the reward of a 5-charge Mana Shield
potion, called Encased Mnemonic Vapor. There are no faction hits or
experience associated with the quest.
Reward:
Encased Mnemonic Vapor