Quartz Sandstone Pebble
Sandstone (SiO2 dominated)
sedimentary
Category
Sedimentary Rock (Possibly Composed Of Various Minerals)
Browse sedimentary rock (possibly composed of various minerals) specimens identified by the Rock Identifier community.
Learn about Sedimentary Rock (Possibly Composed Of Various Minerals) in the encyclopedia
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Leopard Skin Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Sandstone (River Rock)
Arenite (SiO2 based sedimentary rock)
sedimentary
Red Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone Concretion
Septarian Concretion (Nodule)
sedimentary
Sandstone
Sedimentary rock composed mainly of quartz sand grains
sedimentary
Conglomeratic Sandstone
Clastic Sedimentary Rock
sedimentary
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Granite
Intrusive Igneous Rock
igneous
Shale fragment
Shale (Laminated Mudstone)
sedimentary
Granite
Intrusive Igneous Rock
igneous
Sandstone (Quartzite-rich Pebble)
Arenite (primarily SiO2)
sedimentary
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Chalcedony
Silicon Dioxide (SiO2)
mineral
Sandstone (Red Sandstone / River Stone)
Arenite (composed primarily of Quartz, SiO2, with Iron Oxide cementation)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Shale
Mudstone (composed primarily of clay minerals like kaolinite, illite, and smectite, with quartz and calcite)
sedimentary
Oolitic Limestone
Oolite (Sedimentary rock composed of CaCO3)
sedimentary
Granitic Pegmatite
Pegmatitic Granite
igneous
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Granite
Granite (composed mainly of K-feldspar, quartz, and biotite/amphibole)
igneous
Pyrite-bearing Rock
Iron Sulfide (FeS2)
mineral
Mixed River Pebbles (including Unakite and Jasper)
Polymineralic geological specimens
igneous and sedimentary
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Lapis Lazuli
Lapis Lazuli (Complex silicate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Banded gneiss pebble
Gneiss, composed chiefly of quartz, feldspar, and mica/amphibole
metamorphic
Limonite with Trace Fossils
Hydrous Iron Oxide Mixture (FeO(OH)·nH2O)
sedimentary
Sandstone (with garnet granules)
Clastic sedimentary rock (primarily SiO2 with Fe3Al2(SiO4)3 inclusions)
sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily Quartz with Fe2O3 staining)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Limonite
FeO(OH)•nH2O
mineral
Red jasper-like chalcedony pebble
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper
mineral
Diamond
C
gemstone
Biotite (Black Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Sandstone
Sedimentary Rock (Quartz Sandstone)
sedimentary
Quartz (Grain)
Silicon Dioxide (SiO2)
mineral
Quartz–mica metamorphic rock, likely schist
Quartz–muscovite/biotite schist; predominantly SiO₂ quartz with phyllosilicate micas
metamorphic
Red Sandstone (Arkose)
Clastic Sedimentary Rock (Lithic Arkose)
sedimentary
Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary