Special Tool Proficiency

Some tasks require extra training with tools to accomplish. These special proficiencies can be learned in the same manner as regular tool proficiencies, with a few differences: Having these proficiencies does not negate the creation rules of magic items that use the materials listed below, but instead allow for them to be created.
 * You must meet the prerequisite tool proficiency.
 * They only take 5 weeks - (INT mod / 2, rounded down) to learn.

Mithral
Prerequisites: Smith's Tools.

Mithral proficiency allows you to craft items out of Mithral. Mithral items cost 6x their base price to create and have half their weight. Armour made of Mithral can be used to create the Mithral Armor magic item following the same rules as regular magic item creation.

Admantine
Prerequisites: Smith's Tools.

Adamantine proficiency allows you to craft items out of Adamant; however, in order to make Adamant malleable, you must forge the item in the fire of a fire elemental. This elemental must be present for the entire duration of the smithing process. Adamantine items cost 10x their base price to create. Armour made of Adamant can be used to create the Adamantine Armor magic item following the same rules as regular magic item creation.

Firearms
Prerequisites: Tinker's Tools.

Firearm crafting proficiency allows you to craft firearms. You can craft the following firearms if you have this proficiency.

Enchanting Mithral and Admantine Items
Mithral and Adamantine equipment can be made into +1,+2, or +3 enchanted equipment as well, while still retaining their original properties. This must be done as part of the original crafting process and has the same reagent as the regular +X equipment. Making a +X magic item out of Mithral or Adamantine increases the rarity of that item by one step, increasing all costs accordingly other than the reagent.