Minerals

Pyrite (fool's gold - shiny, golden, yellow)

FeS2

Pyrrhotite (brassy, bronze, dark brown)

Fe1-xS

Pentlandite (pinkish, yellow, bronze) - often found with pyrrhotite

(Fe,Ni)9S8

Chalcopyrite (brassy, yellow, iridescent tarnish)

CuFeS2

Galena (silver, metallic luster) - often found with sphalerite

PbS

Sphalerite (dark brown/grey, yellow, reddish, resinous luster) - often found with galena

(Fe,Zn)S

Arsenopyrite (silvery white)

FeAsS

Stibnite (lead grey, bluish black)

Sb2S3

Gold

Au

Bornite (peacock, iridescent tarnish)

Cu5FeS4

Cuprite (deep red)

Cu2O

Malachite (green)

Cu2CO3(OH)2

Molybdenite (silvery grey)

MoS2

Nickeline (pale red)

NiAs

Cobaltite (reddish silver, violent grey)

CoAsS

Ilmenite (iron black, brownish)

FeTiO3

Cassiterite (dark brown, reddish)

SnO2

Wolframite (brownish, black)

WO4

Magnetite (black, grey tint)

Fe3O4

Hematite (rust red, metallic grey)

Fe2O3

Chromite (black grainy, mafic rocks)

FeCr2O4

Azurite (bright blue)

Cu3(CO3)2(OH)2

Barite (white to pinkish)

BaSO4

Magnesite (chalky)

MgCO3

Chrysocolla (powdery blue)

Copper silicate

Bauxite (spheres, red)

Al(OH)3

Cinnabar (red to dark red)

HgS