Sandstone-based Concrete Fragment
Cementitious Composite with Sedimentary Aggregate
sedimentary (man-made/anthropogenic)
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.
Quartzite
Quartzite (SiO2)
metamorphic
Fuchsite (Green Muscovite)
K(Al,Cr)2(AlSi3O10)(OH)2
Mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Schist (specifically Chlorite/Greenschist)
Chlorite Schist
metamorphic
Sandstone (likely Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Marble
Metamorphosed Limestone (principally CaCO3)
metamorphic
Mica Schist
Mica Schist (Complex Silicate Rock)
metamorphic
Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Granite with Epidote
Granite, containing quartz, feldspar, and epidote
Igneous
Schist
Mica Schist
metamorphic
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Schist
Mica Schist
metamorphic
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Muscovite Mica (in Quartz/Feldspar Matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Almandine Garnet
Almandite (Fe3Al2(SiO4)3)
Mineral
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Fuchsite Schist
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist
metamorphic
Unknown Organic Object (likely a berry or fruit)
Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.
Organic Material (likely a fruit or berry)
Greenschist
Chlorite schist
metamorphic
River Stone (Granitic Gneiss)
Foliated Granitic Gneiss
metamorphic
Beryl (Emerald or Aquamarine in Matrix)
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Schist
Mica Schist
metamorphic
Muscovite Schist
Muscovite Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Banded Gneiss
Gneiss (pronounced "nice")
Metamorphic Rock
River Pebble (Likely Quartzite or Gneiss)
Metamorphosed Silicate Rock (primarily SiO2)
metamorphic
Beryl (Variety Mix)
Be3Al2(Si6O18)
Mineral
Rough Emerald
Emerald (Beryl), Be3Al2(SiO3)6
mineral
Quartz (Milky/Smoky variety on matrix)
Silicon Dioxide (SiO2)
mineral
Spessartine Garnet
Manganese aluminum silicate (Mn2+3Al2(SiO4)3)
mineral
Glaucophane-bearing Schist (Blueschist)
Blueschist (Glaucophane-Lawsonite Schist)
metamorphic
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Mica Schist
Mica Schist (primarily Muscovite and/or Biotite composition)
metamorphic
Quartz Vein in Host Rock (Gneiss/Schist)
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Quartz (likely tumbled or naturally water-worn)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Quartz Vein in Schist
Quartz (SiO2) in Mica Schist
metamorphic
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Mica Schist (with Golden/Biotite inclusions)
K(Mg,Fe)3AlSi3O10(F,OH)2 (Biotite), KAl2(AlSi3O10)(F,OH)2 (Muscovite)
metamorphic
Sandstone (Water-worn Cobble)
Arenite (SiO2 based)
sedimentary