Sandstone
Quartz Arenite / Sedimentary Rock
sedimentary
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Composed Of Multiple Minerals) in the encyclopedia
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Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Small quartz-rich pebble or rock fragment
Quartz (silicon dioxide, SiO₂), possibly with iron-oxide staining or host-rock inclusions
mineral
Sandstone
Arenite (Quartz Sandstone)
sedimentary
Granitic Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Gneiss (foliated metamorphic rock)
Gneiss
metamorphic
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Slate
Slate (Metamorphic Rock)
metamorphic
River Pebble (Greywacke / Basalt Pebble)
Indeterminate Rounded Pebble (composed of quartz, feldspar, or mafic minerals)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Shark Tooth Fossil
Lamniformes (Shark tooth fossil composed of Fluorapatite)
fossil
Sandstone
Arenite (typically composed of SiO2)
sedimentary
Vein-bearing metamorphic rock, likely gneiss or schist
Banded silicate rock; likely quartz–feldspar–mica gneiss with a quartz vein
metamorphic
Sandstone
Sandstone (clastic sedimentary rock)
Rock
Sandstone
Arenite (SiO2 based)
sedimentary
Tumbled yellow-orange jasper
Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides
mineral
Quartz in Matrix (Lepidolite or Quartzite)
Silicon Dioxide (SiO2) with host rock
mineral
Serpentine
Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4
metamorphic
Quartzite
Quartzite (composed primarily of SiO2)
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Likely gray granite fragment
Granite, composed mainly of quartz, feldspar, and mica
igneous
Granite Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Unakite
Epidotized Granite (Composed of Orthoclase Feldspar, Epidote, and Quartz)
metamorphic
Eclogite
Eclogite (Omphacite-Garnet rock)
metamorphic
Gravel and Sand Aggregate
Unconsolidated Clastic Sediment
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Arkosic or Lithic Sandstone)
Sandstone (SiO2 predominant)
sedimentary
Red Sandstone
Sandstone (Quartz Arenite / Arkose with Hematite cement)
sedimentary
Greenschist
Chlorite Schist (Greenschist Facies)
metamorphic
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Epidote
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Sandstone
Arenite (primarily SiO2 with various cementing agents)
sedimentary
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)
metamorphic
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)
metamorphic
Gneiss
Gneiss
metamorphic
Moonstone
Orthoclase Feldspar (composed of alternate layers of orthoclase and albite), (K,Na)AlSi3O8
mineral
Sandstone
Arenite (Sedimentary rock composed of sand-sized minerals or rock grains)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite / Lithic sandstone)
sedimentary
Limestone or Sandstone Cobble
Sedimentary rock (Calcium carbonate or Quartz based)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary