Mineral, Often Found In Metamorphic Rocks But Also In Sedimentary And Igneous Rocks

Pyrite

Pyrite (FeS₂)

Citrine

SiO2 (Silicon Dioxide)

Pyrite

Iron Sulfide (FeS2)

Calcite

Calcium Carbonate (CaCO3)

Pyrite

Iron Sulfide (FeS2)

Pyrite (on Quartz/Host Rock)

Iron Sulfide (FeS₂)

Orthoclase Feldspar with Quartz

Orthoclase (KAlSi3O8)

Magnetite (Iron Ore)

Magnetite (Fe3O4)

Ruby

Corundum (Al2O3 with Chromium traces)

Pyrite

Iron Sulfide (FeS2)

Green Aventurine and Clear Quartz

Aventurine (variety of Quartz - SiO2) and Quartz (SiO2)

Rhodonite

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

Gneiss

Foliated Metamorphic Rock (Gneiss)

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Muscovite Mica

Muscovite (Potassium Mica) KAl2(AlSi3O10)(OH)2

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Pyrite

Iron Sulfide (FeS2)

Grey Agate

Silicon Dioxide (SiO2) - Variety of Chalcedony

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Milky Quartz

Silicon Dioxide (SiO2)

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Pyrite

Iron Sulfide (FeS2)

Apatite

Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))

Red Garnet (likely Almandine)

Almandine (Fe3Al2(SiO4)3)

Gneiss

Gneiss

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

Blue Calcite

Calcium Carbonate (CaCO3)

Labradorite

Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Orthoclase Feldspar

Potassium aluminum silicate (KAlSi3O8)

Chalcopyrite in Matrix

Chalcopyrite (CuFeS2)

Labradorite (Dark or Black variety)

Labradorite (member of Plagioclase Feldspar group), (Na,Ca)(Si,Al)4O8

Nephrite Jade

Nephrite (a variety of the mineral actinolite within the amphibole group); Chemical Formula: Ca2(Mg,Fe)5Si8O22(OH)2

Mica Group Minerals

There isn't a single scientific name as 'Mica' refers to a group of phyllosilicate minerals. Common scientific names include Muscovite (KAl₂ (AlSi₃O₁₀)(OH)₂), Biotite (K(Mg,Fe)₃AlSi₃O₁₀(OH)₂), Phlogopite (KMg₃AlSi₃O₁₀(OH)₂), and Lepidolite (K(Li,Al)₃(Al,Si,Rb)₄O₁₀(F,OH)₂).

Labradorite

Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8

Biotite or Phlogopite Mica

K(Mg,Fe)3(AlSi3O10)(F,OH)2

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

Pyrite in Matrix

Iron Sulfide (FeS2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Diopside (likely Chromian Diopside)

Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.

Pyrite

Iron Pyrite (FeS2)

Granitic Gneiss

Gneiss (high-grade metamorphic rock primarily of quartz, feldspar, and mica)