Rock Identifier

Category

Mineral, Specifically A Detrital Grain

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

Pink Granite (Phaneritic Acidic Igneous Rock (primarily SiO2, Al2O3, K2O)) — igneous

Pink Granite

Phaneritic Acidic Igneous Rock (primarily SiO2, Al2O3, K2O)

igneous
Gabbro (Gabbro (phaneritic mafic intrusive rock)) — Igneous

Gabbro

Gabbro (phaneritic mafic intrusive rock)

Igneous
Greenstone with Epidote or Quartz Vein (Epidiorite or Metabasalt (composed largely of Chlorite, Epidote, and Amphibole)) — metamorphic

Greenstone with Epidote or Quartz Vein

Epidiorite or Metabasalt (composed largely of Chlorite, Epidote, and Amphibole)

metamorphic
Sandy Ironstone (Ferruginous Sandstone) — sedimentary

Sandy Ironstone

Ferruginous Sandstone

sedimentary
Granodiorite (Granodiorite (Na,Ca)(Si,Al)4O8) — igneous

Granodiorite

Granodiorite (Na,Ca)(Si,Al)4O8

igneous
Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

igneous
Mica Schist (Mica Schist (predominantly composed of Muscovite or Biotite silicates)) — metamorphic

Mica Schist

Mica Schist (predominantly composed of Muscovite or Biotite silicates)

metamorphic
Wishing Stone (Basalt/Greywacke with Quartz Vein) (Basalt or Siltstone with SiO2 (Quartz) hydrothermal intrusion) — igneous/sedimentary

Wishing Stone (Basalt/Greywacke with Quartz Vein)

Basalt or Siltstone with SiO2 (Quartz) hydrothermal intrusion

igneous/sedimentary
Mica Schist (Mica Schist) — metamorphic

Mica Schist

Mica Schist

metamorphic
Gneiss (Foliated Metamorphic Rock (Gneiss)) — metamorphic

Gneiss

Foliated Metamorphic Rock (Gneiss)

metamorphic
Shale (Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)) — sedimentary

Shale

Fissile Clay-dominant Mudrock (SiO2, Al2O3, K2O, Na2O, CaO, MgO)

sedimentary
Conglomerate (River Rock Aggregate) (Conglomerate (Lithic-clast conglomerate)) — sedimentary

Conglomerate (River Rock Aggregate)

Conglomerate (Lithic-clast conglomerate)

sedimentary
Calamites (Fossilized Horsetail) (Calamites suckowii (Family: Calamitaceae)) — sedimentary

Calamites (Fossilized Horsetail)

Calamites suckowii (Family: Calamitaceae)

sedimentary
Fulgurite (Fulgurite (Lechatelierite), amorphous SiO2) — metamorphic

Fulgurite

Fulgurite (Lechatelierite), amorphous SiO2

metamorphic
Basalt (Mafic volcanic rock (formula varies by mineral content: Ca-plagioclase, Pyroxene, Olivine)) — igneous

Basalt

Mafic volcanic rock (formula varies by mineral content: Ca-plagioclase, Pyroxene, Olivine)

igneous
Granite (Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)

igneous
Granitic Pegmatite (Phaneritic Granite with Potassium Feldspar (KAlSi3O8), Quartz (SiO2), and Plagioclase) — igneous

Granitic Pegmatite

Phaneritic Granite with Potassium Feldspar (KAlSi3O8), Quartz (SiO2), and Plagioclase

igneous
Amphibolite (Amphibolite) — metamorphic

Amphibolite

Amphibolite

metamorphic
Sandstone or Limestone (Sedimentary Rock) — Sedimentary

Sandstone or Limestone

Sedimentary Rock

Sedimentary
Quartz-veined Mudstone or Argillite (SiO2 (Quartz) in Siltstone/Mudstone matrix) — sedimentary

Quartz-veined Mudstone or Argillite

SiO2 (Quartz) in Siltstone/Mudstone matrix

sedimentary
Sunstone (variety of Feldspar) (Oligoclase Sunstone, Plagioclase Feldspar (Na,Ca)Al(Si,Al)Si2O8) — Mineral

Sunstone (variety of Feldspar)

Oligoclase Sunstone, Plagioclase Feldspar (Na,Ca)Al(Si,Al)Si2O8

Mineral
Amazonite (Amazonite (KAlSi3O8) - a variety of Microcline Feldspar) — Mineral

Amazonite

Amazonite (KAlSi3O8) - a variety of Microcline Feldspar

Mineral
Pyrope Garnet (Bohemian Garnets) (Pyrope (from the group Mg3Al2(SiO4)3)) — mineral

Pyrope Garnet (Bohemian Garnets)

Pyrope (from the group Mg3Al2(SiO4)3)

mineral
Basalt (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt

Basalt (Mafic Extrusive Igneous Rock)

igneous
Greenstone (Chlorite schist / Meta-basalt) — metamorphic

Greenstone

Chlorite schist / Meta-basalt

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

Quartzite River Rock

Quartzite (primarily SiO2)

metamorphic
Granitoid Pebble (Graphic Granite/Pegmatite) (Pegmatitic Granite with Quartz and Orthoclase) — igneous

Granitoid Pebble (Graphic Granite/Pegmatite)

Pegmatitic Granite with Quartz and Orthoclase

igneous
Granite (Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)

igneous
Shale (or Mudstone) (Siltstone/Argillite (composed mainly of clay and silt-sized particles)) — sedimentary

Shale (or Mudstone)

Siltstone/Argillite (composed mainly of clay and silt-sized particles)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

sedimentary
Diorite (River Cobble) (Intrusive Igneous Diorite) — igneous

Diorite (River Cobble)

Intrusive Igneous Diorite

igneous
River Cobble (Salt and Pepper Gneiss) (Gneiss (High-grade regional metamorphic rock)) — metamorphic

River Cobble (Salt and Pepper Gneiss)

Gneiss (High-grade regional metamorphic rock)

metamorphic
Basalt with Plagioclase Phenocrysts (Porphyritic Basalt (primarily SiO2, MgO, FeO, and CaO)) — Igneous

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt (primarily SiO2, MgO, FeO, and CaO)

Igneous
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Siltstone with Quartz Vein (Siltstone (primarily SiO2, Al2O3, Fe2O3)) — sedimentary

Siltstone with Quartz Vein

Siltstone (primarily SiO2, Al2O3, Fe2O3)

sedimentary
Diorite (Gneissic) (Diorite) — igneous

Diorite (Gneissic)

Diorite

igneous
Granite (Phaneritic Plutonic Felsic Rock) — igneous

Granite

Phaneritic Plutonic Felsic Rock

igneous
Mica-rich Sandstone or Micaceous Schist Weathering (Micaceous Schist (Muscovite-Quartz composition)) — Metamorphic or Sedimentary depending on local grade

Mica-rich Sandstone or Micaceous Schist Weathering

Micaceous Schist (Muscovite-Quartz composition)

Metamorphic or Sedimentary depending on local grade
Slate (Slate (Foliated metamorphic rock)) — metamorphic

Slate

Slate (Foliated metamorphic rock)

metamorphic
Granodiorite (Granodiorite (Phaneritic intrusive igneous rock containing Plagioclase, Quartz, and Biotite/Amphibole)) — igneous

Granodiorite

Granodiorite (Phaneritic intrusive igneous rock containing Plagioclase, Quartz, and Biotite/Amphibole)

igneous
Wonderstone (Rhyolite (Silicon Dioxide with Iron Oxide impurities)) — igneous

Wonderstone

Rhyolite (Silicon Dioxide with Iron Oxide impurities)

igneous
Jasper Beach Pebble (Silicon Dioxide (SiO2) - Macro-crystalline Quartz) — sedimentary

Jasper Beach Pebble

Silicon Dioxide (SiO2) - Macro-crystalline Quartz

sedimentary