Granodiorite
Granodiorite (Quartz-Feldspar-Biotite Plutonic Rock)
igneous
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
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Red Sandstone
Arenite (primarily composed of SiO2 with Fe2O3 cement)
sedimentary
Sandstone
Arenite (Sedimentary Rock)
sedimentary
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)
metamorphic
Red Sandstone
Arenite (primarily Quartz SiO2 with Hematite Fe2O3 cement)
sedimentary
Greenstone / Greenschist
Greenschist (composed primarily of Chlorite, Epidote, and Actinolite)
metamorphic
Fulgurite
Fulgurite (Lechatelierite), amorphous SiO2
metamorphic
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Seashell (Calcium Carbonate)
Calcium Carbonate (CaCO3)
mineral
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Red Sandstone
Sandstone (principally Quartz with Iron Oxide coating)
sedimentary
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite, Sodalite, Calcite, and Pyrite)
Mineral
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Shale
Fissile mudrock (composed primarily of clay minerals and quartz)
sedimentary
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Quartzite
Quartzite (primarily composed of SiO O₂)
Sedimentary Rock
Greenstone (Greenschist facies)
Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)
metamorphic
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Greenstone / Greenschist
Greenschist (composed of chlorite, epidote, and actinolite)
metamorphic
Gneiss (specifically a Banded Gneiss cobble)
Gneiss (composed mainly of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Granite
Granite
Igneous
Quartzite
Quartzite (composed primarily of Silica, SiO2)
metamorphic
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Quartzite (Yellow/Tan)
Metamorphic Rock composed of Quartz (SiO₂)
metamorphic
Serpentinite
Serpentinite (composed primarily of serpentine group minerals like lizardite, antigorite, and chrysotile)
metamorphic
Granite cobble
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Quartzite
Quartzite (composed primarily of silica, SiO2)
metamorphic
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
igneous
Dalmatian Jasper
Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)
igneous
Sandstone
Arenite (SiO2 based)
sedimentary
Serpentinite
Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)
metamorphic
Bauxite
Bauxite (Al2O3·nH2O)
sedimentary
Slate
Foliated Metamorphic Rock (composed mainly of clay minerals or micas)
metamorphic
Granite (River Cobble)
Phaneritic Plutonic Felsic Rock (Granite)
igneous
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Granite Pebble
Granite (Phaneritic intrusive rock)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous