Clay Concretion / Mudstone Nodule
Sedimentary Concretion (Argillaceous)
sedimentary
Category
Sedimentary Or Mineral
Browse sedimentary or mineral specimens identified by the Rock Identifier community.
Learn about Sedimentary Or Mineral in the encyclopedia
View all →
Sandstone
Clastic Sedimentary Rock
sedimentary
Limestone and Sandstone Assortment
Sedimentary Rock Assemblage
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Likely bituminous coal
Coal, predominantly carbon-rich organic matter with variable maceral and mineral content
sedimentary
Banded gneiss pebble
Gneiss, typically quartz–feldspar–mica assemblage
metamorphic
Gneiss
Foliated quartz–feldspar–mica gneiss
metamorphic
Septarian Pebble
Septarian nodule / Concretion
sedimentary
Limonite Concretion
Hydrated iron oxide-hydroxide, FeO(OH)·nH2O
sedimentary
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Banded Sandstone (Beach Pebble)
Quartz Arenite Sandstone
sedimentary
Sandstone (or Siltstone Concretion)
Arenite / Quartzose Sandstone
sedimentary
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Hematite (likely Botryoidal or Specularite variant)
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Geode (Calcite or Quartz)
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
sedimentary
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Sulphur
Sulfur (S)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Sedimentary Breccia
Clastic Breccia (CaCO3/SiO2 matrix)
sedimentary
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Quartz with Sulfides
Silicon Dioxide (SiO2) with accessory minerals
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Shale (or Mudstone)
Clay mineral aggregate / Fine-grained siliciclastic sedimentary rock
sedimentary
Rhodochrosite with Quartz
Manganese Carbonate (MnCO3) with Silicon Dioxide (SiO2)
mineral
Selenite (variety of Gypsum)
Calcium sulfate dihydrate (CaSO4·2H2O)
mineral
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Red Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone
Clastic sedimentary rock
sedimentary
Red Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Feldspar
Potassium or Plagioclase Feldspar (KAlSi3O8 - NaAlSi3O8)
mineral
Sandstone
Quartzose Sandstone
sedimentary
Shale
Lutaceous sedimentary rock
sedimentary