Quartz (likely Milky Quartz or Chalcedony)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Category
Metamorphic (Likely Gneiss Or Schist Based On Texture)
Browse metamorphic (likely gneiss or schist based on texture) specimens identified by the Rock Identifier community.
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Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Foliated Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Blue Sapphire Crystal (Rough)
Corundum (Aluminum Oxide, Al2O3)
mineral
Blue Quartzite
Quartzite (silicon dioxide, SiO2)
metamorphic
Banded Gneiss
Gneiss
metamorphic
Schist (Oxidized)
Mica Schist with Iron Oxide staining
metamorphic
Jadeite
Jadeite (NaAlSi2O6)
metamorphic
Red Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Mica Schist
Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)
metamorphic
Muscovite Mica
Muscovite / KAl2(AlSi3O10)(OH)2
mineral
Sandstone (likely Graywacke or Siltstone variety)
Clastic Sedimentary Rock (SiO2 with assorted mineral fragments)
sedimentary
Greenschist
Chlorite schist
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Gneiss
Gneiss
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Beryl (likely Aquamarine or Heliodor variant)
Beryllium aluminum cyclosilicate (Be3Al2Si6O18)
mineral
Biotite Schist with Garnet
Garnet-Biotite Schist
metamorphic
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Mica Schist
Foliated Metamorphic Rock (Schist)
metamorphic
Schist with Quartz Veins
Schist with Quartz (SiO2)
metamorphic
Granitoid (Granite/Gneiss)
Granitoid silicate rock, primarily quartz and feldspar
igneous/metamorphic
Chert (likely Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Schist
Mica Schist
metamorphic
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Mica Schist
Mica Schist (Composition: Muscovite, Biotite, Quartz, Feldspar)
metamorphic
Quartzite with Mafic Intrusion (Gneiss/Schist Contact)
Metamorphic Quartzite (SiO2) with Amphibole/Biotite Schist
metamorphic
Greenschist (Greenstone River Pebble)
Greenschist (Chlorite Schist)
metamorphic
Mica
Phlogopite or Biotite group (KMg3(AlSi3O10)(F,OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
mineral
Mica Schist
Schist (Crystalline metamorphic rock)
metamorphic
Gneiss (River Cobble)
Metamorphic Gneiss
metamorphic
Likely schist, possibly serpentinite
Mica schist; potential chlorite–serpentine-rich metamorphic rock
metamorphic
Mica Schist with Pyrite
Mica Schist (FeS2 containing)
metamorphic
Schist
Mica Schist
Metamorphic Rock
Quartz-bearing granite or gneiss fragment
Granite/gneiss composed mainly of quartz (SiO₂), feldspar, and minor mica or ferromagnesian minerals
igneous
Garnet Gneiss
Garnetiferous Gneiss
metamorphic
Fossiliferous Limestone (containing Brachiopods)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Biotite-rich mica schist
Mica schist, dominated by biotite mica (K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂), with probable quartz and feldspar
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Biotite composition)
metamorphic
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Fuchsite in Quartz
K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)
metamorphic