Sandstone (River Rock)
Arenite (SiO2 based sedimentary rock)
sedimentary
Category
Sedimentary Or Metamorphic (Base Substrate)
Browse sedimentary or metamorphic (base substrate) specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Metamorphic (Base Substrate) in the encyclopedia
View all →
Tumbled orbicular granite or granitic gneiss
Granite, chiefly quartz–feldspar–biotite/amphibole; exact variety uncertain from the image
igneous
Quartz-veined Siltstone
Siltstone with Quartz (SiO2) veins
sedimentary
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Muscovite Mica (Golden/Yellow variety)
KAl2(AlSi3O10)(F,OH)2
mineral
Chert with Quartz Veining
Microcrystalline Silica (SiO2)
sedimentary
Milky Quartz with Talc / Serpentine
Silicon Dioxide (SiO2) with Mg3Si4O10(OH)2
metamorphic
Schist (Mica Schist)
Mica Schist
metamorphic
Greenschist
Chlorite schist
metamorphic
Schist
Mica Schist
metamorphic
Serpentine
Serpentinite (group of minerals: (Mg,Fe,Ni,Al)3Si2O5(OH)4)
metamorphic
Pebble
Lithified rock fragment / Sedimentary clast
sedimentary
Sphalerite
Zinc Sulfide (ZnS)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation
SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)
mineral
Granitic Pegmatite (Muscovite and Quartz)
Pegmatite (KAl2(AlSi3O10)(OH)2 / SiO2)
igneous
Fossilized Shell in Limestone
Carbonate sedimentary rock with Bivalvia or Brachiopoda remains
fossil
Garnet in Schist (Mica Schist with Garnet Inclusion)
Garnetiferous Mica Schist (X3Al2(SiO4)3)
metamorphic
Sandstone Cobble
Clastic Sedimentary (Sandstone)
sedimentary
Native American Hammerstone / Pitted Stone
Modified lithic artifact (often quartzite, basalt, or granite)
artifact / sedimentary or igneous rock
Greenschist (Chlorite Schist)
Greenschist (containing Chlorite, Actinolite, and Epidote)
metamorphic
Schist
Mica Schist
metamorphic
Mica schist
Muscovite–biotite schist, commonly with quartz and feldspar
metamorphic
Chert Arrowhead (Flint Projectile Point)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
River Pebble Gravel
Hydrothermally modified Clastic Sediment (mainly Quartzite and Chert)
sedimentary
Mica Schist
Mica Schist (Quartz-Mica Metamorphic Rock)
metamorphic
Weathered limestone or calcareous sandstone
Calcite-rich carbonate rock, chiefly calcium carbonate (CaCO₃), possibly fossiliferous limestone
sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Mica Schist
Mica Schist (contains Muscovite KAl2(AlSi3O10)(OH)2)
metamorphic
Ferruginous Quartz
Ferruginous Quartz (Silicon Dioxide + Iron Oxide, SiO2 + Fe2O3)
mineral
Schist
Schist (primarily mica-schist)
metamorphic
Fuchsite
Chromium-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Mica (likely Muscovite)
Muscovite / KAl2(AlSi3O10)(OH)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Conglomeratic Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite
sedimentary
Biotite on Quartz
Biotite Mica (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary