Source?

“	The drop rate on materials and items related to gathering will only benefit from this stat. (i.e.: Kobold Bandit may drop one Common Leather normally but with a 'Lucky Finish' or 'Huge Lucky Finish' may only result in dropping one more common leather, a Fine Leather, or a Finest Leather.)	„

Source?

I've gotten huge lucky finishes on monsters that dropped mats and other items and have never gotten more than 1 item drop other than gold. To be more specific it was a bear around Dunbarton, and it only dropped one finest leather. I could be mistaken, but I'm pretty sure it was within the last two weeks but I think we should take that down until someone can confirm it.