Sandstone
Clastic sedimentary rock
Category
Browse sedimentary or mineral specimens identified by the Rock Identifier community.
Sandstone
Clastic sedimentary rock
Conglomerate Pebble (with Chert / Quartz)
Sedimentary Conglomerate / Breccia Pebble
Shale
Shale (Consolidated fine-grained clay/silt)
Quartz-veined Sandstone Pebble
Quartzose Sandstone with Quartz Veinlets
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Conglomerate / Breccia Matrix (Aggregated Rock)
Sedimentary Breccia / Conglomerate
Sandstone
Arenite (SiO2 principal)
Banded gneiss
Gneiss, chiefly quartz–feldspar–mica
Chalcedony (Botryoidal)
Silicon Dioxide (SiO2)
Clear Quartz
SiO2 (Silicon Dioxide)
Hematite
Iron(III) oxide (Fe2O3)
Sandstone
Arenite (SiO2 based)
Sandstone
Clastic Sedimentary Rock
Sandstone
Clastic Sedimentary Rock
Red Sandstone Pebble
Sedimentary Quartz Arenite / Arkose
Sandstone Concretion
Sedimentary Concretion (Quartz sand bound by mineral cement)
Sandstone
Clastic Sedimentary Rock
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
Chert / Quartz Pebble
Silicon Dioxide (SiO2)
Sandstone
Sandstone ( преимущественно SiO2 )
Quartz-veined Sandstone
Quartzite-veined Arenite / SiO2 and quartz sand
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (SiO2 with accessory minerals)
Small weathered mineral/rock fragment
Indeterminate; possibly quartz-bearing feldspathic rock or calcite-rich specimen
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
Shale
Argillite / Shaly Mudstone
Jasper
Silicon dioxide (Microcrystalline Quartz, SiO2)
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
Satin Spar (Selenite variant)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
Fossil shell
Likely a fossilized marine bivalve shell; exact taxon is indeterminate from the image.
Dendritic sandstone
Sandstone with Manganese Oxide dendrites
Fossil gastropod shell
Fossilized gastropod, likely a small marine snail; exact genus cannot be determined from the image
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Pyrite
Iron Sulfide (FeS2)
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Conglomerate
Conglomerate (a clastic sedimentary rock)
Mixed sedimentary rock and mineral specimens
Predominantly limestone, chert, sandstone, and iron-oxide-bearing clasts; exact identification requires testing
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Sandstone (Quartzite-rich)
Clastic sedimentary rock (SiO2 primary)