Sand and Gravel (Quartz-rich)
Unconsolidated fluvial/beach sediment (primarily Silica/SiO2)
sedimentary
Category
Sedimentary Or Metamorphic (Low Grade)
Browse sedimentary or metamorphic (low grade) specimens identified by the Rock Identifier community.
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Pyrite
Iron Sulfide (FeS2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Ruby
Corundum (Al2O3)
mineral
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Banded Gneiss
Gneiss (SiO2 enriched metamorphic rock)
metamorphic
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Garnet (Almandine variety)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Gneiss
High-grade regional metamorphic rock (Foliated Gneiss)
metamorphic
Aragonite Star Cluster
Aragonite (CaCO3)
mineral
Gneiss
Gneiss
metamorphic
Tumbled Chalcedony Pebble
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (River Cobble)
Gneiss
metamorphic
Muscovite Schist
Muscovite Schist (KAl2(AlSi3O10)(OH)2 matrix)
metamorphic
Granitic Gneiss
Gneiss (containing Potassium Feldspar and Quartz)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Muscovite Schist
Mica Schist (primarily KAl2(AlSi3O10)(OH)2)
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Granite Gneiss
Gneiss (containing quartz, alkali feldspar, plagioclase, biotite/amphibole)
metamorphic
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Fuchsite
Chromian Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Ironstone (likely Limonite or Goethite)
Ferruginous sedimentary rock (FeO(OH)·nH2O)
sedimentary
Greenstone / Basalt
Aphanitic Mafic Igneous Rock (Metabasalt)
igneous
Prehnite with Epidote
Prehnite (Ca2Al(AlSi3O10)(OH)2) with Epidote inclusions (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Prehnite
Ca2Al2Si3O10(OH)2
mineral
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Schist
Mica Schist
metamorphic
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic