The Gorgonite dagger is a tier 9 dagger, found only in Daemonheim. It is only available to members and it requires level 80 Attack to wield. It can be made from one gorgonite bar, requiring level 80 Smithing and giving 82 experience. It is a possible drop from the Luminescent Icefiend.
- For an exhaustive list of all known sources for this item, see here.