A mineral deposit is an accumulation of valuable minerals or ore in a particular location. Synonyms for mineral deposit include mineral vein, orebody, lode, placer deposit, and mineral occurrence. A mineral vein is a localized zone of mineralization within a rock mass. An orebody is a concentration of minerals or rocks that can be mined economically. A lode is a mineral-bearing vein or zone that is distinct from surrounding rock. Placer deposits are mineral deposits formed through the accumulation of valuable minerals in riverbeds and other bodies of water. Mineral occurrences are naturally occurring concentrations of minerals that may or may not be economically viable for extraction.