Author: Natural History Museum

Is a oxide category mineral – Hematite group is a crystalline form of aluminum oxide It is used as a precious gem

Is a oxide category mineral Is primarily used as a source of tungsten.

are rocks and minerals from which metallic iron can be economically extracted The ores are usually rich in iron oxides are found in sedimentary rocks used to make steel, automobiles, locomotives, ships etc

Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is an abundant natural resource that can be used as a source of energy, as a chemical source from which numerous synthetic compound (e.g., dyes, oils, waxes, pharmaceuticals, and pesticides) can be derived. peat, lignite, bituminous, and anthracite are the types of coal

Is a Sulfate category mineral are found in bedded sedimentary rocks.

Is a sulfide category mineral is the main ore of lead, is found in igneous and metamorphic rocks galena is used in a green glaze applied to pottery.

Is a Oxide category mineral Is the chief ore of the metal tungsten. used for electric filaments and armor-piercing ammunition

is a dull black glassy volcanic rock formed when felsic lava or magma is an extrusive rock that is very resistant to erosion.  

is a group name for hard black manganese oxides

group of orthorhombic pyroxenes. found in igneous and some metamorphic rocks