In mineralogy, Tenacity is a mineral's physical reaction to stressful forces acting upon it. These forces may include, but are not limited to: breaking, tearing, crushing, or bending.[1]


A mineral's tenacity is generally classified into several categories and subcategories detailing the physical reaction by the mineral itself. Examples include: brittle, malleable, conchoidal, fragile, and flexible. Many of the terms used to describe a mineral's tenacity will describe the type of fracture observed, or, if there is no fracture present, the flexibility of the mineral.[2]