What is a single mineral deposit that contains commercially viable amounts of a particular mineral called?

A single mineral deposit that contains commercially viable amounts of a particular mineral is referred to as an ore deposit. This term specifically denotes a concentration of minerals that can be extracted profitably. Ore deposits often contain not just the target mineral but also other materials that can be of economic interest.

An ore deposit is characterized by its grade, which is the amount of the desired mineral found within a specific volume of material. It is this economic potential—based on factors such as concentration, accessibility, and the current market demand—that distinguishes it as an ore deposit rather than just any mineral accumulation.

While "resource" refers broadly to naturally occurring materials that can potentially be extracted, it does not specifically imply that the material is currently economically viable. A "mineral vein" typically describes a fissure or fracture in rock filled with minerals but does not carry the implication of being commercially viable in the way an ore deposit does. A "quarry," on the other hand, is a type of mine from which stone or other materials are extracted but does not specifically relate to a mineral deposit characterized by its value.

Thus, the definition and economic implications involved point clearly to "ore deposit" being the appropriate term for a commercially viable mineral deposit.