This skill enables you to collect Ore Fragments from the beach and near the river in Iria; you must be equipped with a Metallurgy Sieve in your right hand which can be purchased from general shops. Various ore fragments are available including Iron, Copper, Silver, Gold, and Mythril, and they can be refined to ingots at Forge in town. This skill has an extremely low chance of discovering Gems whose types vary depending on the weather, time, and location. Gems, repositories of ancient knowledge, can be exchanged with a variety of experience points when they are given to Spirit Weapons. When given to villagers, they elicit various reactions and may be exchanged with gifts.
To get the skill, with a total Exploration Level of 6 or higher, talk to Effie in Qilla Base Camp about skills. Note: If you have the sieve equipped when you receive the quest from Effie, you'll need to unequip and re-equip it to activate the "Equip a Metallurgy Sieve" requirement for the quest; if you obtain a Gold Ore Fragment before doing this it will not count and you'll have to get another. Changing weapon slots twice is sufficient to complete the quest requirement. Once you get the fragment, talk to Effie to complete the quest.