Petrified Wood
Silicified Wood (SiO2)
metamorphic
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia
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Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Gneiss (Pebble)
Gneiss
metamorphic
Granite
Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)
igneous
Calcite (likely a tumbled specimen)
Calcite (CaCO 3 )
Mineral
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Granitoid (Granite/Gneiss)
Granitoid silicate rock, primarily quartz and feldspar
igneous/metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentinite
Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
metamorphic
Basalt
Basalt (Aphanitic extrusive igneous rock)
igneous
Fossiliferous Limestone (Coquina / Shell Conglomerate)
Bioclastic Limestone (composed primarily of CaCO3)
sedimentary
Granitic Pegmatite
Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)
igneous
Granite
Granite (a felsic intrusive igneous rock composed primarily of quartz, feldspar, and mica)
igneous
Sandstone (Yellow/Tan)
Clastic sedimentary rock (primarily SiO2 with iron oxide staining)
sedimentary
Feldspathic Gneiss (Granite Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Sandstone
Arenite (clastic sedimentary rock)
sedimentary
Banded Agate (Gray/Brown)
Silicon Dioxide (SiO2)
mineral
Shale
Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)
sedimentary
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Greenstone
Metamorphosed Mafic Igneous Rock
metamorphic
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Milky Quartz with Chlorite Schist Inclusions
Quartz (SiO2) with Chlorite Group silicates (typically (Mg,Fe)3(Si,Al)4O10(OH)2)
metamorphic
Schist
Mica Schist
metamorphic
Petrified Wood
Silicified wood (primarily Silicon Dioxide - SiO2)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Lapis Lazuli
Sodalite-rich metamorphic rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic
Basalt
Mafic Volcanic Rock (composed of Plagioclase Feldspar and Pyroxene)
igneous
Unakite
Epidotized Granite (Composed of Orthoclase Feldspar, Epidote, and Quartz)
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Petrified Wood (Silicified Wood)
Silicified Wood / Silicon Dioxide (SiO2)
metamorphic
Diorite (Salt and Pepper Rock)
Diorite
igneous
Quartz (Smoky/Granular variety)
Silicon Dioxide (SiO2)
mineral
Greenschist
Chlorite schist
metamorphic
Sandstone
Arenite
sedimentary
Schist with Biotite and Quartz
Biotite-Quartz Schist (Fe,Mg,Al silicate mix)
metamorphic
Red Aventurine
Aventurine Quartz (SiO2 + Hematite/Goethite)
metamorphic
Granite
Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sandstone (Banded)
Arenite
sedimentary
Granite Gneiss
Gneiss (High-grade regional metamorphic rock)
Metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic