Bloodstone
Heliotrope (a variety of Chalcedony, SiO₂ with inclusions)
Metamorphic Rock
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Mica Schist
Mica Schist (primarily Muscovite and Biotite phyllosilicates)
metamorphic
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Granite
Phaneritic Felsic Igneous Rock (composed of SiO2, KAlSi3O8, NaAlSi3O8)
igneous
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Mineral/Metamorphic Substrate
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Granitic Pegmatite
Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)
igneous
Garnet-Bearing Schist
Almandine Garnet Micaceous Schist
metamorphic
Granite
Granite (phaneritic intrusive igneous rock consisting mainly of quartz, alkali feldspar, and plagioclase)
igneous
Moonstone
Adularia or Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8), specifically with lamellar exsolution of albite and orthoclase.
mineral
Sandstone (lithic/greywacke variety)
Arenite (composed primarily of SiO2 with various lithic fragments)
sedimentary
Greenschist (Greenstone River Pebble)
Greenschist (Chlorite Schist)
metamorphic
Greenschist
Greenschist (Actinolite-Chlorite Schist)
metamorphic
Conglomerate
Conglomerate (a clastic sedimentary rock)
Sedimentary
Lapis Lazuli
Lapis Lazuli (A metamorphic rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, along with Calcite and Pyrite)
metamorphic
Epidosite (Epidote-rich rock)
Epidosite (consisting primarily of Epidote: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))
metamorphic
Greenschist (Greenstone)
Greenschist (Metamorphic rock containing chlorite, actinolite, and epidote)
metamorphic
Slate
Slate (Foliated metamorphic rock)
metamorphic
Basalt
Basalt
igneous
Sandstone
Arenite
sedimentary
Mica Schist
Mica Schist
metamorphic
Basalt
Basalt
Igneous
Sandstone (Banded)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Sandstone
Arenite (composed mainly of SiO2)
sedimentary
Garnet in Matrix (likely Almandine in Quartz/Mica Schist)
Almandine Garnet (Fe3Al2(SiO4)3) in Quartz-Feldspar host rock
metamorphic
Sandstone
Arenite
sedimentary
Basalt
Basalt
Igneous
Serpentinite
Serpentinite (group of hydrous magnesium iron phyllosilicates)
metamorphic
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Sedimentary Rock (possibly composed of various minerals)
Banded Gneiss (with Quartz Vein)
Gneiss (Metamorphic rock of varying mineralogy)
metamorphic
Granite
Granite (Phaneritic Quartz-Feldspar Igneous Rock)
igneous
Green Aventurine
Silicon dioxide with Fuscite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
mineral
Sandstone (with banding/weathering)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite (with iron oxide cement)
sedimentary
Greywacke (likely)
Greywacke (a type of sandstone)
Sedimentary
Granite
Granite (Felsic Plutonic Rock)
igneous
Pebble (river rock/beach pebble)
Pebble (clast size class)
Sedimentary Rock
Granite
Granite (Felsic Plutonic Rock)
igneous