Red Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
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
Sandstone (Quartz Arenite / Arkose with Hematite cement)
sedimentary
Rounded, banded metamorphic cobble
Likely gneiss or foliated quartz-rich metamorphic rock; exact identification is uncertain from the photograph.
metamorphic
Red Sandstone
Sedimentary Arenite / Quartzose Sandstone
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Sandstone (likely Quartzose Sandstone pebble)
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Banded gneiss (likely granitic gneiss)
Foliated gneiss composed mainly of quartz, feldspar, and dark biotite/amphibole
metamorphic
Green Slate or Metamorphic Rock
Metamorphic rock (chlorite/actinolite-bearing)
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Tumbled purple stone, likely amethyst-bearing quartzite or dyed quartz
Quartz (SiO₂), possibly microcrystalline quartzite; purple color may be from iron-related amethyst or artificial dye
mineral
Sea Snail Shell (Top Shell)
Trochidae family (Calcium Carbonate, CaCO3)
mineral
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite (Sandstone)
sedimentary
Mica Schist
Mica Schist (primarily composed of Muscovite, Biotite, and Quartz)
metamorphic
Sandstone (likely Graywacke or Lithic Sandstone)
Clastic Sedimentary Rock
sedimentary
Basalt
Basalt (Mafic volcanic rock)
igneous
Gneiss
Foliated Metamorphic Rock
metamorphic
Sandstone (River Stone)
Arenite (composed primarily of SiO2)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Polished unakite
Unakite; altered granite composed mainly of epidote, pink potassium feldspar, and quartz
metamorphic
Dalmatian Stone
Dalmatian Jasper / Feldspathic Igneous Rock
igneous
Gravel and Sand Aggregate
Unconsolidated Clastic Sediment
sedimentary
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Green schist (probable chlorite–actinolite schist)
Chlorite–actinolite schist; commonly composed of chlorite, actinolite, epidote, albite, and quartz
metamorphic
Sandstone (with prominent jointing/fractures)
Arenite (composed primarily of SiO2)
sedimentary
Quartz Vein in Greenstone
Metamorphic rock with quartz vein (SiO2 / mixed silicates)
metamorphic
Sandstone
Arenite (Sedimentary Rock)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Basalt
Basalt (dominated by plagioclase feldspar and pyroxene minerals)
Igneous
Granite
Granite (Felsic Intrusive)
igneous
Weathered dark volcanic rock, likely basalt
Basalt; fine-grained mafic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine and iron oxides
igneous
Quartz (pebble)
Quartz (SiO₂)
Mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone and Gravel Aggregate
Clastic Sedimentary Rock / Quartzose Sandstone
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Gneissic Schist
Gneiss-schist (Metamorphic rock)
metamorphic
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Greenstone (likely serpentine-rich rock)
Serpentinite, a rock composed mainly of serpentine-group minerals; exact identification is uncertain from the image
metamorphic
Greenstone / Serpentinite
Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous