Sandstone
Arenite (SiO2 primarily)
Category
Browse industrial byproduct (anthropogenic rock like material) specimens identified by the Rock Identifier community.
Sandstone
Arenite (SiO2 primarily)
Sandstone
Arenite (primarily SiO2)
Metaconglomerate
Metaconglomerate (Quartzite conglomerate)
Quartz (Gravel Fragment)
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2) within a sedimentary or volcanic shell
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Mudstone
Argillite / Siliciclastic sedimentary rock
Wavellite with Quartz
Al3(PO4)2(OH,F)3 & SiO2
Stromatolite
Biogenic sedimentary rock
Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
Red Sandstone
Arenite (Ferruginous Sandstone)
Serpentinite
Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)
Agate (Chalcedony)
Silicon Dioxide (SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone
Arenite (SiO2 based typically)
Fossil Coral
Rugosa or Tabulata coral fossil (Calcium Carbonate, CaCO3)
Sandstone
Sandstone (Quartz-rich Arenite / SiO2)
Schist
Schist (variety likely Mica Schist)
Chert (Flint/Jasper)
Silicon Dioxide (SiO2)
Olivine (Peridotite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
Serpentine
Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4
Chert (Grey-Green Var.)
Silicon Dioxide (SiO2)
Granite Pebble
Granite (Phaneritic intrusive igneous rock consisting of Quartz, Alkali Feldspar, and Plagioclase)
Coal
Anthracite / Bituminous Coal
Sandstone
Arenite (SiO2 principal)
Sandstone
Arenite (SiO2 based)
Banded Gneiss
Gneiss (Metamorphic rock)
Quartzite
Quartzite (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Quartz Vein in Host Rock
Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)
Tumbled blue-green stone, likely aquamarine-bearing pegmatite or blue apatite
Probable fluorapatite, Ca5(PO4)3(F,Cl,OH), though visual identification is uncertain
Coal (Anthracite / Bituminous)
Organic Sedimentary Rock (Carbon-based)
Granite Cobble / Gneiss (River Rock)
Granitic Gneiss / Felsic Igneous Rock
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in matrix
Sandstone
Clastic Sedimentary Rock
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
Sandstone (Ferruginous)
Arenite (primarily SiO2 with iron oxide Fe2O3 cement)
Quartz Geode
Silicon Dioxide (SiO2) within a geode
Conglomerate
Clastic Sedimentary Conglomerate (SiO2, CaCO3 dominant)
Sandstone (lithic wacke/conglomerate mix)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
Fossil Snail
Gastropoda (fossilized)
Brachiopod Fossil
Phylum Brachiopoda