mineral

Mica

An aggregated mass of any ore or mineral, in an isolated state, within a rock.

The process of extracting metals or other valuable components from minerals

A trichroic violet-blue variety of the mineral zoisite mined in Tanzania, used as a gemstone.

A clear, deep, red variety of corundum, valued as a precious stone.

Any of a large group of rock-forming minerals that, together, make up about 60% of the earth's outer crust. The feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium. Feldspars are the principal constituents of igneous and plutonic rocks.

An iron ore, mainly peroxide of iron, Fe2O3.

Any naturally occurring inorganic material that has a (more or less) definite chemical composition and characteristic physical properties.

Any of several minerals, aluminosilicates of sodium, potassium, calcium or magnesium, that have a porous structure; they are used in water softeners and in ion exchange chromatography.

To determine which minerals or metals are present in a location.

The water present in the crystals of the salts of certain metals; it is weakly bound by electrostatic forces and may normally be removed by heating.

A variety of trap or basaltic rock, containing small cavities, occupied, wholly or in part, by nodules or geodes of different minerals, especially agates, quartz, calcite, and the zeolites. When the imbedded minerals are detached or removed by decomposition, it is porous, like lava.

A concretion of oxides of manganese and iron found on the floor of many oceans

A gemstone exhibiting chatoyancy.

To wash ore with the aid of a frame.

A dark green mineral resembling serpentine, being a mixed silicate of magnesium, iron and aluminium.

A hydrated borate mineral, Na2B4O6(OH)2, originally discovered in the Mojave Desert.

Water from a spring that naturally contains dissolved minerals, often treated in any of several ways (filtering, aerating etc) and bottled; used either therapeutically or out of preference.

The oxyanion BO33- or any of several more complex derivatives

Of a mineral: containing tellurium.