Quartzite (clastic/metamorphic subtype)
Quartzite (primarily Silicon Dioxide, SiO2)
Category
Browse metamorphic or sedimentary specimens identified by the Rock Identifier community.
Quartzite (clastic/metamorphic subtype)
Quartzite (primarily Silicon Dioxide, SiO2)
Schist (Kyanite Schist)
Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)
Garnet Schist
Almandine Garnet in Schist (X3Al2(SiO4)3)
Gneiss (foliated metamorphic rock)
Gneiss
Gneiss
Gneiss (High-grade metamorphic rock)
Quartz (Gravel Pebble)
Silicon Dioxide (SiO2)
Mica-rich Schist fragment
Mica Schist
Gneiss (Metamorphic Cobble)
Gneiss
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
Mica Schist with Quartz
Mica Schist (principally Muscovite and Biotite with Quartz veins)
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Pink Garnet (likely Almandine or Rhodolite)
Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
Schist (Chlorite or Mica-rich)
Chlorite Schist
Garnet Schist
Almandine Garnet (Fe3Al2(SiO4)3) in Mica Schist
Rhodonite with Manganese Oxides
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Marble (polished)
Recrystallized Calcite (CaCO3)
Muscovite Schist with Quartz
Mica Schist (KAl2(AlSi3O10)(OH)2 with SiO2)
Fuchsite in Quartz
K(Al,Cr)2(AlSi3O10)(OH)2 (Muscovite with Chromium)
Shungite
Non-crystalline carbon (allotrope of carbon)
Gneiss
High-grade Metamorphic Gneiss
Gneiss
Gneiss (High-grade metamorphic rock)
Mica Schist
Muscovite Schist (KAl2(AlSi3O10)(OH)2)
White Marble
Recrystallized Calcite (CaCO3)
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
Gneiss
Gneiss
Marble
Recrystallized Calcite (CaCO3)
Marble
Recrystallized Calcite (CaCO3) Rock
Blue Kyanite
Kyanite (Al2SiO5)
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
Quartz with Schist Matrix
Crystalline Silicon Dioxide (SiO2) in micaceous schist
Agate
Silicon dioxide (SiO2) - Microcrystalline Quartz
Anthracite Coal
Anthracite (Carbon-based sedimentary-metamorphic rock)
Gneiss
Gneiss (foliated metamorphic rock)
Gneiss (Metamorphic Rock)
Gneiss
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
Biotite Schist
Biotite Mica Schist [K(Mg,Fe)3AlSi3O10(OH,F)2]
Labradorite (a variety of Feldspar)
Labradorite; (Na,Ca)(Al,Si)4O8 (a plagioclase feldspar)
Metaconglomerate
Metaconglomerate (Quartzite conglomerate)
Schist
Chlorite/Mica Schist