Metamorphic Rock

Green Tourmaline (Verdelite)

Tourmaline Group; often Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) or Dravite (NaMg3Al6(BO3)3Si6O18(OH)4)

Green Aventurine

Quartz (Aventurine variety) - SiO₂ with Fuchsite inclusions

Epidote

Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Epidosite

Epidosite (predominantly Epidote {Ca2Al2Fe3+Si3O12(OH)} and Quartz {SiO2})

Quartzite

Quartzite (primarily SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Schist

Mica Schist

Banded Sandstone

Arenite with Liesegang banding

Agate Geode Slice (with Druzy Quartz)

Silicon Dioxide (SiO2)

Almandine Garnet

Almandine, Fe3Al2(SiO4)3

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Sandstone or Siltstone

Arenite (if sandstone)

Epidote

Epidote - {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Rhodonite

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

Pyrite

Iron Disulfide (FeS2)

Citrine

SiO2 (Silicon Dioxide)

Quartz (Drusy/Crystalline)

Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Aquamarine with Ruby Accent

Beryllium Aluminum Silicate (Be3Al2Si6O18) with Aluminum Oxide (Al2O3)

Yellow Quartz

Silicon Dioxide (SiO2)

Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Black Tourmaline

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Muscovite Mica

KAl2(AlSi3O10)(F,OH)2

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Druzy Quartz on Limestone

Silicon Dioxide (SiO2)

Aventurine

Silicon Dioxide (SiO2 with inclusions of Fuchsite mica)

White Moonstone (Scolicite or White Feldspar var. )

Lattice-structure Silicate (KAlSi3O8)

Smoky Quartz

Silicon Dioxide (SiO2)

Amazonite

Microcline (KAlSi3O8) with lead impurities

Aventurine Quartz

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Calcite

Calcium Carbonate (CaCO3)

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with trace Iron (Fe)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Pyrite

Iron Disulfide (FeS2)

Lazulite

Magnesium Aluminum Phosphate Hydroxide (MgAl2(PO4)2(OH)2)

Magnetite

Iron(II,III) oxide (Fe3O4)

Smoky Quartz

Silicon Dioxide (SiO2)

Granite (Specimen: Logan Rock)

Phaneritic plutonic igneous rock (mainly Quartz, Feldspar, and Mica)

Chert (Quartzite-rich River Pebble)

Silicon Dioxide (SiO2)

Scoria

Extrusive Basaltic Scoria