Mining Glossary N

Nanotesla - The international unit for measuring magnetic flux density.

Native metal - A metal occurring in nature in pure form, uncombined with other elements.

Net profit interest - A portion of the profit remaining after all charges, including taxes and bookkeeping charges, such as depreciation, have been deducted.

Net smelter return - A share of the net revenues generated from the sale of metal produced by a mine.

Net worth - The difference between total assets and total liabilities.

Norite - A coarse-grained igneous rock that is host to copper/nickel deposits in the Sudbury area of Ontario.

Nugget - A small mass of precious metal, found free in nature.