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.
- "Mineral Properties: Tenacity". http://www.minerals.net/resource/property/tenacity.htm. Retrieved 12 August 2010.
- "Mineral Tenacity and Fracture". http://webmineral.com/help/Fracture.shtml. Retrieved 12 August 2010.
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