Yellow Sapphire (Corundum)
Corundum (Aluminum Oxide, Al2O3)
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.
Learn about Metamorphic (Likely Gneiss Or Schist Based On Texture) in the encyclopedia
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Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Garnet (Tumbled)
Almandine / Pyrope Garnet (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
mineral
Mica Schist
Schist
metamorphic
Yellow Beryl
Beryl (Be3Al2(SiO3)6)
mineral
Gneiss
Gneiss
metamorphic
Zoisite with Hornblende
Zoisite (Ca2Al3(SiO4)3(OH)) with Amphibole inclusions
metamorphic
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Sandstone (Siltstone or Fine-grained)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Gneiss
Gneiss
metamorphic
Purple Garnet
Magnesium Aluminum Silicate (Pyrope-Almandine series) Mg3Al2(SiO4)3
gemstone
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Granite or granitic gneiss pebble
Coarse-grained quartz–feldspar–mica rock; likely granite, possibly foliated gneiss
igneous
Schist
Metamorphic rock (Schist)
metamorphic
Granodiorite (Gneissic texture)
Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)
igneous
River Stone (possibly Gneiss)
Metamorphic Gneiss
metamorphic
Pebble (likely Limestone or Siltstone)
Lithic fragment (calcareous or siliciclastic)
sedimentary
Schist
Schist
metamorphic
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)
metamorphic
Gneiss
Gneiss
metamorphic
Schist
Mica Schist
metamorphic
Lichen-covered graywacke or granitic glacial cobble
Indeterminate; likely quartz–feldspar–mica rock, possibly weathered granite or granodiorite
igneous
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Garnet
Garnet Group (e.g., Almandine Fe3Al2(SiO4)3)
mineral
Biotite Schist
Biotite Schist (predominantly K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Biotite Schist
Biotite-rich Schist (containing K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Sunstone and Garnet
Plagioclase Feldspar ((Na,Ca)(Al,Si)4O8) and Almandine Garnet (Fe3Al2(SiO4)3)
gemstone
Green Schist
Greenschist (composed of chlorite, epidote, and actinolite)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Mica Schist
Schist (Muscovite/Biotite Schist)
metamorphic
Almandine Garnet
Almandine - Fe3Al2(SiO4)3
mineral
Iolite
Cordierite (Magnesium iron aluminium silicate)
mineral
Gneiss
Banded Metamorphic Rock (Gneiss)
metamorphic
Pyritic Gneiss
Metamorphic Gneiss with Pyrite inclusions
metamorphic
Gneiss
Gneiss
metamorphic
Golden Mica Schist
Mica Schist (primarily Muscovite/Biotite with Quartz)
metamorphic
Banded Gneiss
Gneiss (pronounced "nice")
metamorphic
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Banded Gneiss
Gneiss
metamorphic
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Red Garnet
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
mineral