Rock Identifier

Category

Mineral And Sedimentary

Browse mineral and sedimentary specimens identified by the Rock Identifier community.

Green Jasper (Silicon Dioxide (SiO2) with mineral inclusions) — sedimentary

Green Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Sandstone (Arenicola (comprising mostly Quartz, SiO2)) — sedimentary

Sandstone

Arenicola (comprising mostly Quartz, SiO2)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Sandstone (Quartz-rich) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartz-rich)

Arenite (primarily SiO2)

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

Sandstone (likely Quartz Sandstone)

Arenite (composed primarily of SiO2)

Pebble (likely Quartz or Chert) (SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.) — Sedimentary Rock

Pebble (likely Quartz or Chert)

SiO₂ (Silicon Dioxide) - referring to the likely main mineral composition, Quartz. If it's chert, the scientific name remains SiO₂ with a microcrystalline structure.

Sedimentary Rock

Sandstone (with potential fossil inclusions) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (with potential fossil inclusions)

Clastic sedimentary rock (primarily SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Sandstone Concretion with Quartz Center (Sedimentary Clastic Rock (SiO2 matrix with Quartz core)) — sedimentary

Sandstone Concretion with Quartz Center

Sedimentary Clastic Rock (SiO2 matrix with Quartz core)

Sandstone (likely Graywacke or Lithic Sandstone) (Clastic Sedimentary Rock) — sedimentary

Sandstone (likely Graywacke or Lithic Sandstone)

Clastic Sedimentary Rock

Shale (Lutaceous Sedimentary Rock) — sedimentary

Shale

Lutaceous Sedimentary Rock

Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz with Hematite/Limonite oxides)

Sandstone (likely Iron-rich or Arkosic) (Arenite (SiO2 with FeO(OH) or Fe2O3 staining)) — sedimentary

Sandstone (likely Iron-rich or Arkosic)

Arenite (SiO2 with FeO(OH) or Fe2O3 staining)

Sandstone (Greywacke/Siltstone variant) (Arenite / Wacke (SiO2 with diverse mineral inclusions)) — sedimentary

Sandstone (Greywacke/Siltstone variant)

Arenite / Wacke (SiO2 with diverse mineral inclusions)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Sandstone (likely Ferruginous) (Sandstone (SiO2 with iron oxides)) — sedimentary

Sandstone (likely Ferruginous)

Sandstone (SiO2 with iron oxides)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Sandstone (likely Quartzose Sandstone)

Arenite (composed primarily of SiO2)

Chalcedony (variations like Agate or Jasper) (Chalcedony (SiO₂ - microcrystalline quartz)) — Mineral

Chalcedony (variations like Agate or Jasper)

Chalcedony (SiO₂ - microcrystalline quartz)

Gneiss (specifically Banded Gneiss) (Gneiss) — metamorphic

Gneiss (specifically Banded Gneiss)

Gneiss

Bauxite (Bauxite (mixture of hydrous aluminum oxides: Al(OH)3 & AlO(OH))) — sedimentary

Bauxite

Bauxite (mixture of hydrous aluminum oxides: Al(OH)3 & AlO(OH))

Limonite (Ochreous) (FeO(OH)·nH2O (Hydrated Iron Oxide)) — mineral

Limonite (Ochreous)

FeO(OH)·nH2O (Hydrated Iron Oxide)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Sandstone (Ferruginous)

Arenite (Fe-rich)

Sandstone (Sandstone (various mineral compositions)) — Sedimentary

Sandstone

Sandstone (various mineral compositions)

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

Hematite Nodules (Moqui Marbles style)

Iron Oxide (Fe2O3)

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

Sandstone (Pebble)

Arenite (primarily SiO2)

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

Gneiss

Gneiss (High-grade metamorphic rock)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Limonite (Iron Ore) (Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)) — sedimentary

Limonite (Iron Ore)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

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

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

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

Gneiss (specifically Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

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

Sandstone (Graywacke type)

Clastic Sedimentary Rock (Lithic Sandstone)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily SiO2)

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

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

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

Fluorite (Rainbow Fluorite)

Calcium Fluoride (CaF2)