Geographic Minerals

Cobalt is a hard gray metal element. It’s part of vitamin B-12. This vitamin is essential for making red blood cells. It also maintains the…

Cobalt (Co) is a chemical element, and its atomic number 27, ferromagnetic metal of Group 9 (VIIIb) of the periodic table, used especially for heat-resistant…

Rare-Earth Elements (REEs) or Rare-Earth Metal (REM), are a group of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides, as well as…

Definition – Rare-Earth Elements (REEs) are a group of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides, as well as scandium and yttrium.…

Definition – Scoria is a dark-colored igneous rock (or volcanic rock) with abundant round bubble-like cavities known as vesicles. The word scoria comes from the…

Definition – Tuff (from the Italian tufo), also known as volcanic tuff, is an igneous rock that forms from the products of an explosive volcanic…

Definition – Soapstone (also known as steatite or soaprock) is a metamorphic rock that is composed primarily of talc, with varying amounts of chlorite, pyroxenes,…

Definition – Siltstone is a clastic sedimentary rock composed mainly of silt-sized particles. It forms where water, wind, or ice deposit silt, and the silt…

Definition – Trap Rock, also known as either trapp or trap, is a name used in the construction industry for any dark-colored igneous rock that…

Definition – Schist (pronounced /ʃɪst/ SHIST), megascopically crystalline rock that has a highly developed schistosity, or tendency to split into layers. Banding (foliation) is typically…

Definition – Pumice ( /ˈpʌmɪs/), called pumicite in its powdered or dust form, is a light-colored, extremely porous igneous rock that forms during explosive volcanic…

Definition – Skarns or tactites, in geology, metamorphic zone developed in the contact area around igneous rock intrusions when carbonate sedimentary rocks are invaded by…