N

Refined and unrefined mineral products, namely, base metals and their alloys, metal ores and metal ore concentrates, copper ore, copper ore concentrate, zinc ore, and zinc ore concentrate, lead ore, and lead ore concentrate

Refined and unrefined mineral products, namely, precious metals and their alloys, gold ores and gold ore concentrates, and silver ores and silver ore concentrates, precious metal bullion, semi-wrought precious metals cast into button-shaped discs for use in further manufacture, and precious metal ore

Mining extraction

Material processing, namely, obtaining metals from native earth materials