Quartz / Quartz Cluster
Silicon Dioxide (SiO2)
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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Smoky Quartz
Quartz (Silicon Dioxide), Formula: SiO2
mineral
Greenschist
Greenschist (composed mainly of chlorite, epidote, actinolite, and albite)
metamorphic
Quartzite
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (SiO2 + impurities)
sedimentary
Orange Sapphire
Corundum (Al2O3 with trace elements)
gemstone
Greenstone (Metabalt)
Chlorite schist / Altered Basalt
metamorphic
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Likely quartz-rich metamorphic rock (quartzite or milky quartz)
Quartzite; predominantly quartz (SiO₂), possibly with feldspar and iron-oxide staining
metamorphic
Quartz-rich metamorphic rock, likely milky quartz or quartzite
Quartz (SiO₂); possibly quartzite composed predominantly of recrystallized quartz
metamorphic
Weathered fine-grained stone, likely sandstone or quartzite
Quartz-rich sandstone (possibly weakly metamorphosed quartzite); predominantly SiO₂
sedimentary
Quartz-bearing altered rock, possibly iron-stained quartz vein
Quartz (SiO₂) in a feldspathic/sericitized host, with iron-oxide staining
mineral
Milky Quartz Pebble
Crystalline Quartz (SiO2)
mineral
Quartzite with Iron Inclusions
Metamorphosed Quartz-Rich Sandstone (SiO2 with Fe2O3)
metamorphic
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Quartz-rich rock, possibly milky quartz or quartzite fragment
Quartz (SiO₂), potentially quartzite if metamorphic
mineral
Greenstone / Quartzite Pebble
Metamorphosed Quartz-rich Rock
metamorphic
Quartzite with Chlorite staining
Metamorphic Quartzite (SiO2 with Chlorite inclusions)
metamorphic
Yellow Quartzite
Quartzite (SiO2)
metamorphic
Fossiliferous Limestone
CaCO3 (with biological inclusions)
sedimentary
Green Schist
Greenschist (containing Chlorite, Actinolite, and Epidote)
metamorphic
Emerald
Beryl (Be₃Al₂(SiO₃)‑₆) with Chromium/Vanadium impurities
mineral
Sapphire
Corundum (Al2O3)
Mineral
Red Granite
Phaneritic Felsic Igneous Rock
igneous
Magnetite
Magnetite (Fe3O4)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Quartz (milky quartz), possibly calcite
Quartz: SiO₂; visual identification is uncertain because the specimen is wet and lacks diagnostic crystal faces
mineral
Fuchsite
Chrome-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Schist with Biotite Inclusion
Biotite-bearing Mica Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Quartz-rich metamorphic rock, likely quartzite
Quartzite; predominantly microcrystalline quartz (SiO₂), possibly with mica or feldspar
metamorphic
Quartz Vein in Greenstone
Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock
metamorphic
Green Aventurine (Tumbled Quartz)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)3Si3O10(OH)2)
metamorphic
Quartzite
Quartzite (containing SiO2)
metamorphic
Sandstone
Sandstone (Silicon dioxide, SiO2 based)
sedimentary
Chert (River Pebble)
Chert (Silica, SiO2)
sedimentary
Sandstone (Quartzite Pebble)
Arenite / Metamorphosed Sandstone (SiO2)
sedimentary
Basalt with Iron Oxidation (Lattice/Veined)
Mafic Volcanic Rock (principally Plagioclase and Pyroxene)
igneous
Quartzite Pebble
Metamorphic rock primarily composed of Silicon Dioxide (SiO2)
metamorphic