Gemstones

Refining
Gemstones are generally found around Newhaven in an unrefined form. In order of them to be used for enchantment, they need to be refined.

Refining a gemstone cost 50 Gold, and requires Spirit Gossamer, Glass Wings and Half-Eaten Treasure

Enchantment
Refined Gemstones can be used to enchant various weaponry to boost things like: Damage, Stats or just Bonuses.