Sedimentary And Metamorphic Minerals

Pyrite

Iron Sulfide (FeS2)

Sapphirine in Magnesian Schist

Sapphirine: (Mg,Al)8(Al,Si)6O20

Graphite

Graphite (Carbon, C)

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide), NaFe3Al6(BO3)3Si6O18(OH)4

Peacock Ore (Bornite or Iridescent Chalcopyrite)

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2) with tarnish

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Mica (Muscovite)

Muscovite (KAl2(AlSi3O10)(OH)2)

Marble

Marbles are primarily composed of calcite (calcium carbonate, CaCO3) or dolomite (calcium magnesium carbonate, CaMg(CO3)2).

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite mica)

Slate

Foliated low-grade metamorphic rock

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Rhodonite

Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite

Iron Pyrite (FeS2)

Greenstone (Epidote/Chlorite-rich Metabasalt)

Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))

Limonite (Iron Ore/Hydrated Iron Oxide)

Limonite (mixture of FeO(OH)·nH₂O minerals, mainly Goethite, FeO(OH) and Lepidocrocite, FeO(OH))

Quartzite with Chlorite/Epidote

Metamorphosed Quartzite (SiO2)

Chlorite (Small Flakes/Sand)

Chlorite Group (Magnesium Iron Aluminum Silicate Hydroxide - (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Banded Gneiss (Variety of Gneiss)

Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)

White Jade / White Chalcedony

Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)

Schist

N/A (a rock type, not a mineral formula)

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz

Quartz (SiO2, Silicon Dioxide)

Citrine

SiO2 (Silicon Dioxide)

Ironstone Concretion / Limonite-stained Siltstone

Ironstone (primarily Limonite FeO(OH)·nH2O and Siltstone)

Greenstone

Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Garnet (Almandine)

Almandine, Fe3Al2Si3O12

Blue Quartz

Quartz (SiO2) with inclusions

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Quartz (Milky/Smoky variety)

Silicon Dioxide (SiO2)

Quartz (Milky/Common)

Quartz (Silicon Dioxide, SiO2)

Clear/White Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Granite Gneiss

Gneiss (high-grade metamorphic rock)

Pyrite

Iron Sulfide (FeS2)

Green Aventurine and Clear Quartz

Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)

Specular Hematite

Specularite (Fe2O3)

Quartz

Quartz (SiO₂)

Muscovite Mica

Muscovite (Potassium Aluminum Silicate Hydroxide Fluoride), KAl2(AlSi3O10)(OH,F)2