Rock Identifier

Category

Mineral, Often Found As Detrital Grains In Sedimentary Rocks

Browse mineral, often found as detrital grains in sedimentary rocks specimens identified by the Rock Identifier community.

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

Red Sandstone (Old Red Sandstone Pebble) (Arenite with iron oxide (Fe2O3) cement) — sedimentary

Red Sandstone (Old Red Sandstone Pebble)

Arenite with iron oxide (Fe2O3) cement

Quartzite pebble (Quartzite (SiO2)) — metamorphic

Quartzite pebble

Quartzite (SiO2)

Quartzite Pebbles (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebbles

Quartzite (primarily SiO2)

Arkosic Sandstone (Arkose) — sedimentary

Arkosic Sandstone

Arkose

Granite (Pink/Potassium Feldspar Granite) (Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)) — igneous

Granite (Pink/Potassium Feldspar Granite)

Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2) in matrix) — Mineral in Metamorphic/Igneous Host

Quartz Vein in Host Rock

Silicon Dioxide (SiO2) in matrix

Mineral in Metamorphic/Igneous Host

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Granitic Gneiss (Gneiss (high-grade metamorphic rock primarily of quartz, feldspar, and mica)) — metamorphic

Granitic Gneiss

Gneiss (high-grade metamorphic rock primarily of quartz, feldspar, and mica)

Quartzite (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

Quartzite

Quartzite (primarily Silicon Dioxide, SiO2)

Foliated Metamorphic Rock (likely Gneiss or Schist) (Gneissic Metamorphic Rock) — metamorphic

Foliated Metamorphic Rock (likely Gneiss or Schist)

Gneissic Metamorphic Rock

Quartzite Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

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

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

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

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Fossiliferous Limestone (Bivalve Fossil) (Calcium Carbonate (CaCO3) with Bivalvia fossil) — sedimentary

Fossiliferous Limestone (Bivalve Fossil)

Calcium Carbonate (CaCO3) with Bivalvia fossil

Pink Chalcedony (Silicon Dioxide (SiO2)) — mineral

Pink Chalcedony

Silicon Dioxide (SiO2)

Dalmatian Jasper / Dalmatian Stone (Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)) — igneous

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Blue Chalcedony (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Quartzite Cobble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Cobble

Quartzite (primarily SiO2)

Red Siltstone (Siltstone (composed mainly of SiO2 and Fe2O3)) — sedimentary

Red Siltstone

Siltstone (composed mainly of SiO2 and Fe2O3)

Fluorite (Green Fluorite) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Green Fluorite)

Calcium Fluoride (CaF2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Pegmatite (Granitic Pegmatite) — igneous

Pegmatite

Granitic Pegmatite

Quartzite River Rock (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Quartzite (primarily SiO2)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Granite Sand (Decomposed Granite) (Grus / Quartz-Feldspar Detritus) — sedimentary

Granite Sand (Decomposed Granite)

Grus / Quartz-Feldspar Detritus

Siltstone (Siltstone (primarily SiO2, Al2O3)) — sedimentary

Siltstone

Siltstone (primarily SiO2, Al2O3)

Sandstone (Sandstone (Sedimentary rock composed of silicate grains)) — sedimentary

Sandstone

Sandstone (Sedimentary rock composed of silicate grains)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Gneiss (specifically Granitic Gneiss) (Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)) — metamorphic

Gneiss (specifically Granitic Gneiss)

Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)

Agate (Agate (a variety of Chalcedony, SiO2)) — Mineral

Agate

Agate (a variety of Chalcedony, SiO2)

Granite (Granite (felsic intrusive igneous rock)) — igneous

Granite

Granite (felsic intrusive igneous rock)

Variscite in Matrix (Variscite (AlPO4 · 2H2O)) — mineral

Variscite in Matrix

Variscite (AlPO4 · 2H2O)

Sandstone (Cross-bedded Drill Core) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Cross-bedded Drill Core)

Clastic Sedimentary Rock (primarily SiO2)

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Sandstone (Quartzose) (Arenite (Formula: SiO2 primary, with various cements)) — sedimentary

Sandstone (Quartzose)

Arenite (Formula: SiO2 primary, with various cements)