Rock Identifier

Category

Sedimentary (Chemically Precipitated Mineral)

Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.

Sandstone (likely Quartzose Sandstone) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sandstone (Sandstone (various mineral compositions)) — Sedimentary

Sandstone

Sandstone (various mineral compositions)

Sandstone (Ferruginous) (Arenite (Fe-rich)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich)

Hematite Nodules (Moqui Marbles style) (Iron Oxide (Fe2O3)) — mineral

Hematite Nodules (Moqui Marbles style)

Iron Oxide (Fe2O3)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Sandstone (Pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Pebble)

Arenite (primarily SiO2)

Sandstone (Iron-stained) (Arenite (composed primarily of SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Iron-stained)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Sandstone (with potentially metamorphic or basaltic bands) (Arenite / Lithic Wacke) — sedimentary

Sandstone (with potentially metamorphic or basaltic bands)

Arenite / Lithic Wacke

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Quartzite Pebble (Quartzite (composed primarily of Silica, SiO2)) — metamorphic

Quartzite Pebble

Quartzite (composed primarily of Silica, SiO2)

Quartzite with Quartz Veining (Quartzite (primarily SiO2)) — metamorphic

Quartzite with Quartz Veining

Quartzite (primarily SiO2)

Gneiss (specifically Granite Gneiss) (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss (specifically Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Satin Spar (often marketed as Selenite) (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — mineral

Satin Spar (often marketed as Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Chrysoprase (Chalcedony (cryptocrystalline silica containing nickel); Chemical Formula: SiO2 with Ni impurities) — mineral

Chrysoprase

Chalcedony (cryptocrystalline silica containing nickel); Chemical Formula: SiO2 with Ni impurities

Opal (Hydrated Amorphous Silica (SiO2·nH2O)) — mineral

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Sandstone (Graywacke type) (Clastic Sedimentary Rock (Lithic Sandstone)) — sedimentary

Sandstone (Graywacke type)

Clastic Sedimentary Rock (Lithic Sandstone)

Ironstone Concretion / Goethite-Hematite Nodule (Goethite/Hematite (α-FeO(OH) / Fe2O3)) — sedimentary

Ironstone Concretion / Goethite-Hematite Nodule

Goethite/Hematite (α-FeO(OH) / Fe2O3)

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

Fluorite (Rainbow Fluorite) (Calcium Fluoride (CaF2)) — Mineral

Fluorite (Rainbow Fluorite)

Calcium Fluoride (CaF2)

Yellow Quartzite (Silicon Dioxide (SiO2)) — metamorphic

Yellow Quartzite

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Red Quartzite (Ferruginous Quartz) (Quartzite (SiO2 with Fe2O3 inclusions)) — metamorphic

Red Quartzite (Ferruginous Quartz)

Quartzite (SiO2 with Fe2O3 inclusions)

Red Jasper (Jasper (Silicate mineral - SiO2)) — sedimentary

Red Jasper

Jasper (Silicate mineral - SiO2)

Sandstone (Ferruginous) (Arenite with Iron Oxide cement (SiO2 + Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (SiO2 + Fe2O3)

Sandstone (Ferruginous) (Arenite (composed primarily of SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Sandstone (Arenite (Clastic Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)

Banded Gneiss (Gneiss (high-grade metamorphic silicate rock)) — metamorphic

Banded Gneiss

Gneiss (high-grade metamorphic silicate rock)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pyrite in Quartzite/Graphite Matrix (Iron Sulfide (FeS2)) — Mineral

Pyrite in Quartzite/Graphite Matrix

Iron Sulfide (FeS2)

Satin Spar (Gypsum variety) (Calcium Sulfate Dihydrate (CaSO4·2H2O)) — mineral

Satin Spar (Gypsum variety)

Calcium Sulfate Dihydrate (CaSO4·2H2O)

Black Obsidian and Hematite (Volcanic Glass (SiO2) and Hematite (Fe2O3)) — igneous and mineral

Black Obsidian and Hematite

Volcanic Glass (SiO2) and Hematite (Fe2O3)

igneous and mineral

Pyrulite (Pyrite / Chalcopyrite) (Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)) — mineral

Pyrulite (Pyrite / Chalcopyrite)

Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Gypsum Wallboard (Drywall) (Hydrous calcium sulfate (CaSO4·2H2O)) — sedimentary (processed mineral product)

Gypsum Wallboard (Drywall)

Hydrous calcium sulfate (CaSO4·2H2O)

sedimentary (processed mineral product)

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Turquoise and Hematite (Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)) — mineral

Turquoise and Hematite

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)