Brachiopod Fossil in Limestone
Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)
sedimentary
Category
Mineral On Sedimentary Rock
Browse mineral on sedimentary rock specimens identified by the Rock Identifier community.
Turquoise in Matrix
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Gneiss
Foliated Metamorphic Rock (Gneiss)
metamorphic
Fluorite (Rainbow Fluorite)
Calcium Fluoride (CaF2)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminium phosphate)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian
Carnelian Chalcedony (SiO2 with iron oxide impurities)
mineral
Quartz (specifically Clear Quartz or Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Dyed Agate
Silicon Dioxide (SiO2)
mineral
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium) CuAl6(PO4)4(OH)8·4H2O
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Dalmatian Stone (often misnamed Dalmatian Jasper)
Aplite (with hornblende/arfvedsonite inclusions)
igneous
Ferruginous Sandstone
Clastic sedimentary rock (SiO2 with Fe2O3/FeO(OH) cement)
sedimentary
Sandstone Beach Pebble
Clastic Sedimentary Rock (primarily Quartz with Iron Oxide coating)
sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Oolitic Limestone
Oolite (Sedimentary rock composed of CaCO3)
sedimentary
Black Limestone with Calcite Veining
Bituminous Limestone (CaCO3 with Organic Carbon inclusions)
sedimentary
Conglomerate
Conglomerate
Sedimentary Rock
Limonitic Sandstone (Stained Sandstone)
Clastic Sedimentary Rock with Iron Oxide (Limonite/Goethite) staining
sedimentary
Almandine Garnet
Almandine (Fe3Al2Si3O12)
mineral
Sandstone (Ferruginous)
Arenite (Fe-rich SiO2)
sedimentary
Shale with Pyrite
Clastic sedimentary rock containing Iron Disulfide (FeS2)
sedimentary
Halite (Rock Salt)
Halite (Sodium Chloride, NaCl)
mineral
Sedimentary Breccia
Clastic Breccia (CaCO3/SiO2 matrix)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Dalmatian Stone (Dalmatian Jasper)
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Sandstone (Ferruginous)
Clastic sedimentary rock (primarily SiO2 with Fe2O3 cement)
sedimentary
Manganese-coated Sandstone
Clastic sedimentary rock with Manganese Oxide (often Pyrolusite or Psilomelane)
sedimentary
River Stone (Quartzite/Siltstone mixture)
Silicon Dioxide (SiO2) based metamorphosed sandstone
metamorphic or sedimentary
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)
sedimentary
Geode with Quartz Crystal Cavity
Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix
sedimentary
Quartz (Milky/Crystal Variety)
Silicon Dioxide (SiO2)
mineral
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Sandstone (River Pebble)
Arenite (SiO2 based)
sedimentary
Sandstone (Ferruginous)
Sandstone (SiO2 with iron oxide inclusions)
sedimentary
Sandstone (Ferruginous)
Arenite (with Hematite/Limonite cement)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone (Flagstone)
Arenite (composed primarily of SiO2)
sedimentary
Quartz Vein in River Siltstone
Crystalline Quartz (SiO2) in Siliclastic Matrix
sedimentary