What does the Treasure hunter perk actually do?

The Treasure hunter perk reads:

Treasure hunter - 50% greater chance of finding special treasure

What is "special treasure" and does 50% actually make a big difference? Is it 50% of 0.01% to find a special item off of a mob?


Special Treasure means enchanted items. (Pretty much any items with magical properties)
I've tested around with this, and yes there is quite a difference but only from chests. Haven't noticed any difference on mobs. Normally you get to loot what the NPC is wearing and holding. I don't believe that they randomly generate loot when they die.