Gypsum (Alabaster variety)
Calcium sulfate dihydrate (CaSO4·2H2O)
mineral
Category
Sedimentary Mineral
Browse sedimentary mineral specimens identified by the Rock Identifier community.
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Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Sandstone (with minor weathering/pitting)
Clastic Sedimentary Rock (composed mostly of SiO2)
sedimentary
Mixed Mineral and Fossil Collection
Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Limonite
FeO(OH)·nH2O
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
mineral
Limonite Geode / Ironstone Concretion
Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite
sedimentary
Ironstone (Limonite/Hematite concretion)
Ferruginous Siltstone / Goethite (FeO(OH))
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 based with Fe2O3 banding)
sedimentary
Sphalerite
Zinc Sulfide (ZnS)
mineral
Zebra Jasper
Silicified sedimentary rock (SiO2) with mineral inclusions
sedimentary
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone
Sedimentary Clastic Rock
sedimentary
Sandstone (with Siltstone/Greywacke variations)
Sedimentary Rock (Clastic)
sedimentary
Iron-stained quartz (likely quartzite or quartz-rich rock)
Quartz, silicon dioxide (SiO₂), with iron-oxide staining
mineral
Sandstone Pebble
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Shale
Laminated Mudstone
sedimentary
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Geode
Quartz / Chalcedony nodule
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Shale
Argillite / Shale
sedimentary
Shale (sub-type: Carbonaceous Shale)
Lutaceous Sedimentary Rock
sedimentary
Aragonite Star Cluster (Cross-section)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Sandstone (likely Arkose or Lithic)
Clastic sedimentary rock (SiO2 + impurities)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
sedimentary
Limonite
FeO(OH)·n(H2O)
mineral
Yellow Ochre / Limonite
Hydrated ferric oxide (FeO(OH)·nH2O)
mineral
Sandstone (with Concretion)
Arenite / Quartzose Sandstone
sedimentary
Coquina / Shelly Sandstone
Calcareous Sandstone / Coquina
sedimentary
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Sandstone Pebble
Sedimentary quartz arenite
sedimentary
Limonite (Ironstone)
Hydrated Iron Oxide (FeO(OH)·nH2O)
mineral