A surname from Norwegian.

plural of Orness

Any treatment of an ore used to concentrate its valuable constituents (minerals) into products (concentrate) of smaller bulk, and simultaneously to collect the worthless material (gangue) into discardable waste (tailings).

any ore containing elemental sulfur, or a sulfide from which it may be obtained

Alternative spelling of sulfur ore

(geology) any rock containing commercially interesting amounts of copper

A large deposit of a mineral or minerals, below the earth's crust.

plural of ore body

hematite in reniform habit

(mining) A mineral deposit from which iron can be viably extracted.