Wolframite is a tungstate mineral composed chiefly of iron and manganese tungstate, with the general formula (Fe,Mn)WO₄. It represents a solid-solution series between two endmembers: ferberite (FeWO₄), rich...
Scheelite is a calcium tungstate mineral, chemically represented by the formula CaWO₄, and is one of the primary ores of tungsten. It stands as an important member of...
Ferberite is an iron tungstate mineral with the chemical formula FeWO₄, and it represents the iron-rich endmember of the wolframite solid-solution series, the other endmember being hübnerite (MnWO₄)....
Chromite is an oxide mineral composed of iron(II) chromium(III) oxide, with the ideal chemical formula FeCr₂O₄. It is the chief ore of chromium, an element crucial to the...
Magnesiochromite is a naturally occurring oxide mineral belonging to the spinel group, characterised by its formula MgCr₂O₄. It represents the magnesium-rich end-member of the chromite–hercynite solid-solution series, where...
Pyrolusite is a manganese dioxide mineral with the chemical formula MnO₂ and is the principal ore of manganese, an element essential for steelmaking, batteries, pigments, and numerous chemical...
Rhodochrosite is a manganese carbonate mineral with the chemical formula MnCO₃, recognised for its striking pink to rose-red colour. It is one of the most aesthetically appealing minerals...
Braunite is a complex manganese silicate–oxide mineral with the general formula Mn²⁺Mn³⁺₆SiO₁₂, often containing variable amounts of iron (Fe), calcium (Ca), and other trace elements. It is one...
Argentite is a high-temperature mineral form of silver sulphide (Ag₂S), belonging to the sulphide mineral class. It represents the cubic (isometric) form of silver sulphide, stable above 173...
Cerargyrite—also known by the names chlorargyrite or horn silver—is a halide mineral composed of silver chloride (AgCl). It is an important secondary ore of silver, particularly in oxidised...
