Rock Identifier

Category

Mineral, Specifically A Detrital Grain

Browse mineral, specifically a detrital grain specimens identified by the Rock Identifier community.

Sandstone (Quartzose) (Arenite (predominantly SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (predominantly SiO2)

Sandstone (Red/Brown Variety) (Arenite (SiO2 with iron oxide impurities)) — sedimentary

Sandstone (Red/Brown Variety)

Arenite (SiO2 with iron oxide impurities)

Greenschist (Greenschist (composed of Chlorite, Actinolite, and Epidote)) — metamorphic

Greenschist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Pink Quartzite (Quartzite (SiO2 with iron oxide impurities)) — metamorphic

Pink Quartzite

Quartzite (SiO2 with iron oxide impurities)

Gabbro (Gabbro) — igneous

Gabbro

Gabbro

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Quartzite (Metamorphosed Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Sandstone (SiO2)

Banded Gneiss (with Quartz Vein) (Gneiss (Metamorphic rock of varying mineralogy)) — metamorphic

Banded Gneiss (with Quartz Vein)

Gneiss (Metamorphic rock of varying mineralogy)

Greenschist (Greenschist (Chlorite Schist)) — metamorphic

Greenschist

Greenschist (Chlorite Schist)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Desert Rose (Gypsum (CaSO4·2H2O) or Barite (BaSO4) with Sand inclusions) — mineral

Desert Rose

Gypsum (CaSO4·2H2O) or Barite (BaSO4) with Sand inclusions

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Gneiss (Metamorphic Cobble) (Gneiss) — metamorphic

Gneiss (Metamorphic Cobble)

Gneiss

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Basalt with Garnet inclusions (Basalt containing Nesosilicate (Garnet Group, likely Almandine Fe3Al2Si3O12)) — igneous

Basalt with Garnet inclusions

Basalt containing Nesosilicate (Garnet Group, likely Almandine Fe3Al2Si3O12)

Sandstone (likely Siltstone) (Arenite or Siltstone (high SiO2 content)) — sedimentary

Sandstone (likely Siltstone)

Arenite or Siltstone (high SiO2 content)

Sandstone (Gneissic or Banded) (Clastic Sedimentary Rock (composed predominantly of SiO2)) — sedimentary

Sandstone (Gneissic or Banded)

Clastic Sedimentary Rock (composed predominantly of SiO2)

Mica Schist (Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)) — metamorphic

Mica Schist

Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)

Granite (Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)) — igneous

Granite

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)

Ferruginous Sandstone (Gritstone) (Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))) — sedimentary

Ferruginous Sandstone (Gritstone)

Arenite with Iron-Oxide Cement (SiO2 with Fe2O3 and FeO(OH))

Sandstone (Quartzose Sandstone) (Arenite (SiO2 principal component)) — sedimentary

Sandstone (Quartzose Sandstone)

Arenite (SiO2 principal component)

Basalt (with possible mineral veining) (Basalt (Aphanitic Mafic Igneous Rock)) — Igneous

Basalt (with possible mineral veining)

Basalt (Aphanitic Mafic Igneous Rock)

Greenstone (Greenschist) — metamorphic

Greenstone

Greenschist

Granite (Granite (composed primarily of Quartz SiO2 and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8))) — igneous

Granite

Granite (composed primarily of Quartz SiO2 and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8))

Sandstone with Tafoni Weathering (Arenite (SiO2 based)) — sedimentary

Sandstone with Tafoni Weathering

Arenite (SiO2 based)

Sandstone (Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)) — sedimentary

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz and/or feldspar)

Sandstone (Quartzite-rich Pebble) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich Pebble)

Arenite (primarily SiO2)

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

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Quartzite-rich Pebble) (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone (Quartzite-rich Pebble)

Arenite (composed primarily of SiO2)

Banded Sandstone (Zebra Stone) (Arenite with Iron Oxide Banding (Liesegang rings)) — sedimentary

Banded Sandstone (Zebra Stone)

Arenite with Iron Oxide Banding (Liesegang rings)

Sandstone Pebble (Arenite (primarily SiO2)) — sedimentary

Sandstone Pebble

Arenite (primarily SiO2)

Red Sandstone (Arenite (with Iron Oxide)) — sedimentary

Red Sandstone

Arenite (with Iron Oxide)

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

Sandstone (Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

Mica Schist (Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)) — metamorphic

Mica Schist

Mica Schist (Main mineral constituents: Muscovite/Biotite, Quartz, Feldspar)

Sandstone (likely Quartzose Sandstone with mineral staining) (Arenite (composed mainly of SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone with mineral staining)

Arenite (composed mainly of SiO2)

Sandstone (Arenite (variable SiO2 composition)) — sedimentary

Sandstone

Arenite (variable SiO2 composition)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Vesicular Basalt (or Porphyritic Scoria) (Vesicular Basalt) — igneous

Vesicular Basalt (or Porphyritic Scoria)

Vesicular Basalt

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

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Ferruginous) (Clastic Sedimentary Rock (SiO2 with FeO/Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Clastic Sedimentary Rock (SiO2 with FeO/Fe2O3)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)