Mineral (Native Element Alloy)

Rhodochrosite

Manganese Carbonate (MnCO3)

Calcite

Calcium Carbonate (CaCO3)

Malachite-bearing Rock

Cu2CO3(OH)2

Graphite

Carbon (C)

Galena

Lead Sulfide (PbS)

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Chrysotile Asbestos

Chrysotile (Mg3Si2O5(OH)4)

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

K-Feldspar (Potassium Feldspar)

Orthoclase / Microcline (KAlSi3O8)

Microcline Feldspar

KAlSi3O8

Graphite

Graphite (Carbon, C)

Pyrite

Iron Sulfide (FeS2)

Limonite

FeO(OH)·nH2O

Limonite

FeO(OH)·nH2O (Hydrated iron oxide-hydroxide)

Marble

Recrystallized Calcite (CaCO3)

Sandstone with Secondary Mineral Encrustation

Arenite with Silica/Calcite deposits (SiO2 or CaCO3)

Amazonite

Microcline (KAlSi3O8) with Trace Elements

Specular Hematite

Hematite (Fe2O3)

Ironstone / Hematite

Iron(III) oxide (Fe2O3)

Graphite

Graphite (Carbon, C)

Galena with Pyrite

Lead Sulfide (PbS) associated with Iron Sulfide (FeS2)

Chalcopyrite

CuFeS2

Hematite

Hematite (Fe2O3)

Pyrite

Iron Sulfide (FeS2)

Feldspar

Triclinic or Monoclinic Tectosilicate (e.g., KAlSi3O8)

Pyrite

Iron Sulfide (FeS2)

Limonite

FeO(OH)·nH2O

Pyrite

Iron Sulfide (FeS2)

Mica Schist or Muscovite

KAl2(AlSi3O10)(OH)2

Limonite with Gossan / Iron Ore

Hydrated iron oxide-hydroxide, approximately FeO(OH)·nH2O

Graphite

Graphite (Carbon, C)

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(F,OH)2)

Sodalite

Na8Al6Si6O24Cl2

Fluorite

Calcium fluoride (CaF2)

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Banded Sandstone (Water-worn Pebble)

Arenite with mineral banding

Quartz Pebble

Silicon Dioxide (SiO2)

Fossil Shark Tooth

Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth

Basalt

Extrusive Igneous Rock