Greenstone (Greenschist facies)
Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)
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
View all →
Unakite
Altered Granite (Granitic Metamorphic Rock)
metamorphic
Sandstone
Arenite (major component SiO2)
sedimentary
Eclogite
Eclogite (composed primarily of Omphacite and Pyrope Garnet)
metamorphic
Gneiss
Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)
metamorphic
Sandstone
Clastic sedimentary rock (primarily quartz arenite)
sedimentary
Dalmatian Jasper
Dalmatian Stone (a microcrystalline quartz and feldspar rock with arfvedsonite)
igneous
Red Sandstone
Arenite (primarily composed of SiO2 with Fe2O3 cement)
sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Magnetite
Fe3O4 (Iron(II,III) oxide)
mineral
Serpentine
Serpentinite (composed primarily of Mg3Si2O5(OH)4)
metamorphic
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite, Sodalite, Calcite, and Pyrite)
Mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg, Fe)3Si2O5(OH)4)
metamorphic
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Mineral, Sediment
Dalmatian Stone and Lapis Lazuli
Dalmatian Stone (Felsic Igneous Rock) with Lapis Lazuli
igneous
Schist
Mica Schist
metamorphic
Quartzite (River Pebble)
Quartzite (composed primarily of Silica, SiO2)
metamorphic
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)
Quartzite
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Wishing Stone with Quartz Veins
Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)
metamorphic
Fossilized Sand Dollar
Echinoidea (Clypeasteroida)
fossil
Mica Schist
Schist
metamorphic
Gneiss
Metamorphic Gneiss
metamorphic
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica/Amphibole)
metamorphic
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Lapis Lazuli
Complex rock composed mainly of lazurite, calcite, and pyrite
gemstone
Greenschist / Serpentinite Cobble
Greenschist (composed primarily of chlorite, actinolite, and epidote)
metamorphic
Gneiss (Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Mica)
metamorphic
Sandstone
Arenite
sedimentary
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Dalmatian Jasper
Microcrystalline Quartz with Arfvedsonite and Tourmaline inclusions
igneous
Granodiorite
Granodiorite (Quartz-Feldspar-Biotite Plutonic Rock)
igneous
Green Slate or Metamorphic Rock with Moss/Lichen
Metamorphic rock / Phyllite or Slate variant
metamorphic
Sandstone (Ferruginous)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Red-and-gray granitic gneiss
Gneiss, composed mainly of quartz, feldspar, and mica with iron-oxide staining
metamorphic
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
igneous
Sandstone (River Rock)
Arenite (composed primarily of SiO2)
sedimentary
Banded Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Red Sandstone
Arenite (primarily Quartz SiO2 with Hematite Fe2O3 cement)
sedimentary