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

Amethyst (Rough)

Silicon Dioxide with iron impurities (SiO2)

Sodalite

Na8(Al6Si6O24)Cl2

Quartz (possibly milky quartz)

Quartz (Silica; SiO₂)

Quartz Sand Gravel

Silicon Dioxide (SiO2)

Blue Quartz

Quartz (SiO2) with inclusions

Sodalite

Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)

Soapstone (Steatite)

Steatite (primarily Talc: Mg3Si4O10(OH)2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Tourmaline (Multi-colored)

Complex Borosilicate (Na,Ca)(Li,Mg,Al,Fe)3Al6(BO3)3Si6O18(OH)4

Yellow Quartz (Citrine Quartzite)

Silicon Dioxide (SiO2)

Pyrite

Iron Disulfide (FeS2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Greenschist

Chlorite schist

Smoky Quartz

Quartz (Silicon Dioxide), Formula: SiO2

Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Pyrite

Iron Disulfide (FeS2)

Agate

Banded Chalcedony (SiO2 - Silicon Dioxide)

Citrine

Silicon Dioxide (SiO₂)

Rhodonite

Rhodonite; (Mn,Fe,Mg,Ca)SiO3

Agate

Agate (a cryptocrystalline variety of Quartz, SiO₂)

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety with hematite or goethite inclusions) Chemical Formula: (Ca,Na)(Al,Si)2Si2O8

Smoky Quartz (Tumbled)

Smoky Quartz (Silicon Dioxide - SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Black Sapphire (Basaltic Blue Sapphire)

Corundum (Al2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz

Silicon Dioxide (SiO2) / Rock Crystal

Pyrite

Iron Sulfide (FeS2)

Carnelian

Carnelian (variety of Chalcedony, SiO2)

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Clear)

Silicon Dioxide (SiO2)

Rose Quartz

Rose Quartz (SiO2)

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Bi-Color Tourmaline (or Watermelon Tourmaline)

Tourmaline (complex borosilicate mineral group with general formula AD3G6(BO3)3T6O18(OH,O)4)

Quartz (Milky or Grainy Variety)

Silicon Dioxide (SiO2)

Schist

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

Ruby

Corundum (Aluminium Oxide with Chromium impurities, Al2O3:Cr)

Sandstone

Arenite (primarily SiO2)

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)