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

Hematite

Iron(III) oxide (Fe2O3)

Fluorite in Matrix

Fluorite (CaF2) within a host rock matrix

Schist

Mica Schist

Garnet (almandine or pyrope variety)

Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3

Rough Star Sapphire (Corundum)

Al2O3 (Aluminum Oxide)

Yellow Chalcedony (common opal or chert variant)

Silicon Dioxide (SiO2)

Quartz (likely Clear Quartz or Rock Crystal)

Quartz (SiO2)

Quartz

Quartz (SiO2 - Silicon Dioxide)

Kaolinite (Chalky Clay)

Kaolinite (Al2Si2O5(OH)4)

Iolite (Cordierite)

Magnesium Iron Aluminum Silicate (Mg,Fe)2Al4Si5O18

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Blue Sapphire

Corundum (Al2O3)

Pyrite

Iron Sulfide (FeS2)

Pyrite (on host rock/ore)

Iron Sulfide (FeS2)

Labradorite

(Ca, Na)(Al, Si)4O8 (Plagioclase Feldspar)

Rhodonite

Rhodonite (Manganese Iron Magnesium Calcium Silicate)

Serpentine

Serpentinite (rock), Serpentine group minerals (e.g., Antigorite, Lizardite, Chrysotile)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Schist

Mica Schist

Quartz

Silicon Dioxide (SiO₂)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Rhodonite

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

Gneiss

Gneiss (High-grade regional metamorphic rock)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Chalcedony (Common Agate)

Silicon Dioxide (SiO2)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Quartz (vein quartz)

SiO2 (Silicon Dioxide)

Rhodochrosite

Manganese carbonate (MnCO3)

Yellow Chalcedony

Chalcedony (a cryptocrystalline variety of Quartz, SiO₂)

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Quartz

Silicon Dioxide (SiO₂)

Aventurine

Silicon Dioxide (SiO2) with inclusions

Banded Gneiss

Gneiss (High-grade regional metamorphic rock)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Gneiss

Gneiss

Rainbow Moonstone with Black Tourmaline

White Labradorite with Schorl (Na,Ca)(Al,Si)4O8

Black Tourmaline

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

Sodalite

Sodalite, Na8(Al6Si6O24)Cl2

Smoky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)