EOSC Lab Minerals

Fluorite (formula and class)

CaF2, Halide

Halite (formula and class)

NaCl, Halide

Sylvite (formula and class)

KCl, Halide

Scheelite (formula and class)

CaWO4, tungstate

Apatite (formula and class)

Ca5(PO4)3(OH, F, Cl), phosphate

Copper (formula and class)

Cu, native element

Sulfur (formula and class)

S, native element

Graphite (formula and class)

C, native element

Gold (formula and class)

Au, native element

Bornite (formula and class)

Cu5FeS4, sulphide

Sphalerite (formula and class)

ZnS (Zn, Fe), sulphide

Cinnabar (formula and class)

HgS, sulphide

Molybdenite (formula and class)

MoS2, sulphide

Covellite (formula and class)

CuS, sulphide

Chalcopyrite (formula and class)

CuFeS2, Sulphide

Pyrrhotite (formula and class)

Fe(1-x)S2, sulphide

Pyrite (formula and class)

FeS2, sulphide

Marcasite (formula and class)

FeS2, sulphide

Arsenopyrite (formula and class)

FeAsS, sulphide

Chalcocite (formula and class)

Cu2S, sulphide

Pentlandite (formula and class)

(Fe,Ni)9S8, sulphide

Hematite (formula and class)

Fe2O3, oxide

Corundum (formula and class)

Al2O3, oxide

Ilmenite (formula and class)

FeTiO3, oxide

Magnetite (formula and class)

Fe3O4, oxide

Rutile (formula and class)

TiO2, oxide

Chromite (formula and class)

FeCr2O4, oxide

Bauxite (formula and class)

Al OH complex, hydroxide

Goethite (formula and class)

FeO(OH), hydroxide

Dolomite (formula and class)

(Ca,Mg)(CO3)2, carbonate

Malachite (formula and class)

Cu2CO3(OH)2, carbonate

Magnesite (formula and class)

MgCO3, carbonate

Rhodochrosite (formula and class)

MnCO3, carbonate

Siderite (formula and class)

FeCO3, carbonate

Calcite (formula and class)

CaCO3, carbonate

Aragonite

CaCO3, carbonate

Azurite (formula and class)

Cu3(CO3)2(OH)2, carbonate

Gypsum (formula and class)

CaSO4·2H2O, sulphate

Barite (formula and class)

BaSO4, sulphates

Mineral, diagnosis

Calcite, Strong acid reaction, rhombohedral cleavage

Mineral, diagnosis

Gypsum, Very soft, 1 perfect cleavage plane, vitreous to pearly, no acid reaction

Mineral, diagnosis

Gypsum, Very soft, 1 perfect cleavage plane, vitreous to pearly, no acid reaction

Mineral, diagnosis

Dolomite, hardness 3.5-4, weak powdered acid reaction

Mineral, diagnosis

Malachite, Green/teal silky, weak acid reaction, greenish streak

Mineral, diagnosis

Malachite, Green/teal silky, weak acid reaction, greenish streak

Mineral, diagnosis

Rhodochrosite, Pink, weak acid reaction, black areas of Mn oxidation

Mineral, diagnosis

Rhodochrosite, Pink, weak acid reaction, black areas of Mn oxidation

Mineral, diagnosis

Aragonite, Radial habit, strong acid reaction

Mineral, diagnosis

Magnesite, Darker and speckly, weak acid reaction, high SG than most carbonates, can fluoresce blue/green

Mineral, diagnosis

Azurite, Strong acid reaction, blue vitreous, associated with malachite

Mineral, diagnosis

Siderite, Brown/orange due to iron, 3.5-5

Mineral, diagnosis

Barite, No acid reaction, high SG, tabular habit

Mineral, diagnosis

Fluorite, Cubic habit, octahedral cleavage

Mineral, diagnosis

Halite, salty, hardness 2.5, cubic habit

Mineral, diagnosis

Sylvite, Salty/bitter, cubic habit, salmon colour

Mineral, diagnosis

Scheelite, heavy, fluorescence, orange part of white structure, H 4-4.5

Mineral, diagnosis

Apatite, vitreous, hexagonal prismatic with basal cleavage

Mineral, diagnosis

Copper, copper streak, malleable, high specific gravity

Mineral, diagnosis

Copper, copper streak, malleable, high specific gravity

Mineral, diagnosis

Sulfur, bright yellow resinous, very soft, stinks with acid

Mineral, diagnosis

Graphite, metallic dark grey streak, hardness 1 to 2, perfect basal sheets

Mineral, diagnosis

Gold, gold streak, high specific gravity, soft

Mineral, diagnosis

Bornite, iridescent, stinks with acid, metallic lustre

Mineral, diagnosis

Bornite, iridescent, stinks with acid, metallic lustre

Mineral, diagnosis

Sphalerite, red internal reflections, light brown/yellow streak

Mineral, diagnosis

Cinnabar, bright red, granular, cannot handle

Mineral, diagnosis

Molybdenite, flexible, metallic purple/blue lustre, silver streak

Mineral, diagnosis

Covellite, indigo blue metallic lustre, iridescent streak, hardness 1.5

Mineral, diagnosis

Chalcopyrite, spray paint gold, softer than pyrite, copper-y weathering, greenish gold metallic lustre

Mineral, diagnosis

Pyrrhotite, magnetic, brassy metallic lustre, black streak

Mineral, diagnosis

Pyrite, silvery gold metallic, cubic habit, striations, hardness 5.5-7

Mineral, diagnosis

Pyrite, silvery gold metallic, cubic habit, striations, hardness 5.5-7

Mineral, diagnosis

Marcasite, tabular/platey habit (leaf shape), greenish streak

Mineral, diagnosis

Arsenopyrite, silvery metallic, dark streak, non-cubic, softer than pyrite

Mineral, diagnosis

Chalcocite, hardness 2.5, high specific gravity, metallic silver lustre

Minerals, diagnosis

Red: pentlandite, brightly metallic, silvery gold, not magnetic (makes magnet skip across surface)

Blue: pyrrhotite, magnetic, brassy metallic lustre

Mineral, diagnosis

Hematite, rusty red streak, can be bright metallic or reddish earthy dull

Mineral, diagnosis

Corundum, hexagonal prism, hardness 9, pink/purple vitreous

Mineral, diagnosis

Ilmenite, harder than other black minerals (5-6), weakly magnetic, orange weathered patches

mineral, diagnosis

Magnetite, Strongly magnetic, dark black sub-metallic

Mineral, diagnosis

Rutile, Rusty weathering, light grey streak, weathering

Mineral, diagnosis

Chromite, Dark metallic, brown streak, can have isometric habit

Mineral, diagnosis

Bauxite, Pseudopisolitic, light brown streak, light

Mineral, diagnosis

Goethite, Globular, rusty orange OR yellow/brown streak, earthy dull

Quartz (formula, class, subclass)

SiO2, Silicate, tectosilicate

Chalcedony (formula, class, subclass)

SiO2, Silicate, tectosilicate

Opal (formula, class, subclass)

SiO2 nH2O, Silicate, tectosilicate

Microcline (Amazonite)

(K,Na)(Al,Si)4O8, Silicate, tectosilicate (alkali feldspar)

Labradorite (formula, class, subclass)

(Ca,Na)(Al,Si)4O8, Silicate, Tectosilicate (plagioclase)

Albite (formula, class, subclass)

NaAlSi3O8, Silicate, tectosilicate (plagioclase)

Nepheline (formula, class, subclass)

NaAlSiO4, silicate, tectosilicate

Leucite (formula, class, subclass)

KAlSi2O6, silicate, tectosilicate

Sodalite (formula, class, subclass)

Na4Al3Si3O12Cl, silicate, tectosilicate

Analcime (formula, class, subclass)

NaAlSi2O6•(H2O), silicate, tectosilicate

Talc (formula, class, subclass)

Mg3Si4O10(OH)2, silicate, phyllosilicate

Kaolinite (formula, class, subclass)

Al2Si2O5(OH)4, silicate, phyllosilicate 

Serpentine (formula, class, subclass)

(Mg,Fe,)3Si2O5(OH)4, silicate, phyllosilicate

Lepidolite (formula, class, subclass)

K(Li,Al)2-3(AlSi3O10)(F,OH)2, silicate, phyllosilicate

Muscovite

KAl2(AlSi3O10)(F,Cl,OH)2, silicate, phyllosilicate