Mineral And Metamorphic Rock

Gneiss

Gneiss (High-grade metamorphic rock)

Garnet (Almandine)

Almandine, Fe3Al2(SiO4)3

Unakite (Epidotized Granite)

Unakite; primarily composed of Epidote (Ca2(Al,Fe)3(SiO4)3(OH)), Orthoclase (KAlSi3O8), and Quartz (SiO2)

Emerald with Matrix (Emerald in Mica Schist)

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Milky Quartz

Silicon Dioxide (SiO2)

Pyrite in Shale

Iron Sulfide (FeS2)

Unakite

Unakite (altered granitic rock)

Lapis Lazuli (Raw)

Lazurite-rich metamorphic rock; Na3Ca(Al3Si3O12)S

Gneiss (specifically Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Ruby in Zoisite with Hornblende

Anyolite (Ruby: Al2O3, Zoisite: Ca2Al3(SiO4)3(OH))

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Lapis Lazuli

Na8[Al6Si6O24]S2 (Lazurite component), a rock composed primarily of Lazurite, Calcite, and Pyrite

Gneiss (Metamorphic Rock)

Gneiss (high-grade regional metamorphic rock)

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Pink Tourmaline (Rubellite)

Elbaite (Tourmaline group) - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4

Gneiss

High-grade foliated metamorphic rock

Gneiss

Gneiss (High-grade metamorphic rock)

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Green Aventurine

Silicon Dioxide (SiO2) with inclusions

River Quartzite Siltstone

Quartz-rich Meta-siltstone (SiO2 dominated)

Biotite Mica

K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2

Granite Gneiss

Gneiss (high-grade metamorphic rock)

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) within metamorphic/igneous matrix

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Giallo Ornamental Granite

Phaneritic Igneous Rock (composed of Quartz, Feldspar, and Mica)

Quartz Pebble (Water-worn Quartzite)

Silicon Dioxide (SiO2)

Agatized Petrified Wood

Silicon Dioxide (SiO2) - Chalcedony pseudomorph after Wood

Quartz Vein in Host Rock (Gneiss/Schist)

Silicon Dioxide (SiO2) within a metamorphic matrix

Slate

Slate (Foliated Metamorphic Rock)

Blue Apatite

Apatite - Ca5(PO4)3(F,Cl,OH)

Biotite Mica

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

Quartz (Milky Quartz/Citrine Type)

Silicon Dioxide (SiO2)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Garnet-Bearing Schist

Almandine Garnet Micaceous Schist

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)

Gneiss

Gneiss (High-grade Metamorphic Rock)

Lapis Lazuli

Lapis Lazuli (Complex silicate rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Quartz Crystal

Silicon Dioxide (SiO2)

Slate

Slate (Foliated metamorphic rock)