I discovered that the Molten weapons from the Cathedral of Flames dungeon armor/weapon vendor that the Molten Harpoon is actually a Spear and the Molten Speargun is actually a Harpoon.
So these are labeled incorrectly and could mislead some people into buying the incorrect weapon they want.
ASRock H77M – Intel i5-3470 – G.Skill 8GB 1600MHz – HiS Radeon HD 7850 2GB