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

Greenstone / Greenschist

Chlorite schist / Epidiorite

Quartz Pebble

Silicon Dioxide (SiO2)

Pink Feldspar

Orthoclase Feldspar (KAlSi3O8)

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Quartzite

Quartzite (primarily SiO2)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Quartz Geode

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Water-worn pebble)

Silicon Dioxide (SiO2)

Sandstone (Water-worn Cobble)

Arenite (SiO2 based)

Eudialyte in Matrix

Na15Ca6Fe3Zr3Si26O72(OH,Cl,H2O)3

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Chalcedony (Agate/Chert)

Silicon Dioxide (SiO2)

Schist (specifically Mica Schist)

Mica Schist (primarily composed of Muscovite KAl2(AlSi3O10)(OH)2 and Biotite)

Banded Gneiss

Gneiss (Metamorphic high-grade rock)

Greenstone / Nephrite Jade

Tremolite-actinolite series (Ca2(Mg,Fe)5Si8O22(OH)2)

Granite (with Almandine Garnet inclusions)

Granite composed primarily of Quartz (SiO2), K-Feldspar (KAlSi3O8), and Almandine Garnet (Fe3Al2(SiO4)3)

Limestone

Limestone (Calcium Carbonate: CaCO3)

Quartz (variety of colors)

SiO2 (Silicon Dioxide)

Hematite

Iron(III) oxide (Fe2O3)

Rhodonite

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

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Gneiss

Gneiss

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Shale

Lutaceous Sedimentary Rock

Chalcedony (Agate)

Silicon Dioxide (SiO2)

Banded Gneiss

Gneiss

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)

Garnetiferous Pegmatite

Pegmatite with Almandine Garnet and Muscovite

Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins

Altered mafic rock or Epidosite

Rose Quartz

Rose Quartz (SiO2 with traces of Titanium, Iron, or Manganese)

Greenstone

Greenschist (composed of chlorite, actinolite, and epidote)

Peridot

Olivine (Magnesium Iron Silicate), (Mg, Fe)2SiO4

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous)

Arenite with Iron Oxide staining (Fe2O3)

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Carnelian Agate

Carnelian (Silicon Dioxide - SiO2)