Rock Identifier

Category

Mineral, Often A Rock Given Its Aggregate Nature

Browse mineral, often a rock given its aggregate nature specimens identified by the Rock Identifier community.

Red Jasper (SiO2 (Silicon Dioxide with Iron inclusions)) — sedimentary

Red Jasper

SiO2 (Silicon Dioxide with Iron inclusions)

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

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

Quartz (Milky/Clear Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear Variety)

Silicon Dioxide (SiO2)

Serpentinite (Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)) — metamorphic

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

River Pebble (Basalt) (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

River Pebble (Basalt)

Basalt (Aphanitic Mafic Igneous Rock)

Jasper with Hematite inclusions (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)) — sedimentary

Jasper with Hematite inclusions

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Basalt (Basalt) — igneous

Basalt

Basalt

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

Granite

Granite (a felsic intrusive igneous rock)

Basalt (River Pebble) (Basalt) — igneous

Basalt (River Pebble)

Basalt

Scoria (Lava Rock) (Scoria (Mafic volcanic rock)) — igneous

Scoria (Lava Rock)

Scoria (Mafic volcanic rock)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

River Stone / Pebble (Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)) — Mineral, Sediment

River Stone / Pebble

Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)

Mineral, Sediment

Yellow Quartzite River Cobble (Meta-quartzite (SiO2 with iron oxide staining)) — metamorphic

Yellow Quartzite River Cobble

Meta-quartzite (SiO2 with iron oxide staining)

Pink Quartz (Rose Quartz variant) (Silicon Dioxide (SiO2)) — mineral

Pink Quartz (Rose Quartz variant)

Silicon Dioxide (SiO2)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Granite (Granite) — Igneous

Granite

Granite

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Granite (Pink/Red) (Phaneritic Igneous Rock (Rich in K-Feldspar)) — igneous

Granite (Pink/Red)

Phaneritic Igneous Rock (Rich in K-Feldspar)

Pumice (Vesicular volcanic glass) — igneous

Pumice

Vesicular volcanic glass

Basalt (Mafic extrusive igneous rock) — igneous

Basalt

Mafic extrusive igneous rock

Sandstone (Sandstone (clastic sedimentary rock)) — Rock

Sandstone

Sandstone (clastic sedimentary rock)

Pumice (Pumice (volcanic glass froth)) — igneous

Pumice

Pumice (volcanic glass froth)

Jasper and Ironstone (likely Jasperized Ironstone) (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)) — sedimentary

Jasper and Ironstone (likely Jasperized Ironstone)

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3)

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

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

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

Dalmatian Jasper / Dalmatian Stone

Peralkaline Rock (Silicon Dioxide with Amphibole inclusions)

Milky Quartz (Crystalline Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Brimstone (Native Sulfur) (Native Sulfur (S)) — mineral

Brimstone (Native Sulfur)

Native Sulfur (S)

Basalt (River Pebble) (Basalt) — igneous

Basalt (River Pebble)

Basalt

Chert (Jasper/Flint variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Basalt River Stone (Basalt (Aphanitic Mafic Volcanic Rock)) — igneous

Basalt River Stone

Basalt (Aphanitic Mafic Volcanic Rock)

Siltstone with flute casts or scratch marks (Clastic Sedimentary Rock (Siltstone/Fine-grained Sandstone)) — sedimentary

Siltstone with flute casts or scratch marks

Clastic Sedimentary Rock (Siltstone/Fine-grained Sandstone)

Cloudy Quartz (Silicon Dioxide (SiO2)) — mineral

Cloudy Quartz

Silicon Dioxide (SiO2)

Lepidolite (Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)) — mineral

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Red Quartzite / Metasandstone River Pebble (Quartzite (primarily SiO2 with hematite inclusions)) — metamorphic

Red Quartzite / Metasandstone River Pebble

Quartzite (primarily SiO2 with hematite inclusions)

Epidotite (Unakite variety) (Epidotized Granite (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidotite (Unakite variety)

Epidotized Granite (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Jasper (Iron-rich Chert) (Silicon Dioxide (SiO2) with impurities of Hematite or Goethite) — sedimentary

Jasper (Iron-rich Chert)

Silicon Dioxide (SiO2) with impurities of Hematite or Goethite

Chert (often called Flint) (Chert (Microcrystalline or cryptocrystalline Silica, SiO2)) — sedimentary

Chert (often called Flint)

Chert (Microcrystalline or cryptocrystalline Silica, SiO2)

Shale (Fissile Siliciclastic Sedimentary Rock) — sedimentary

Shale

Fissile Siliciclastic Sedimentary Rock

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Basalt (Basalt (extrusive volcanic rock)) — igneous

Basalt

Basalt (extrusive volcanic rock)

Amygdaloidal Basalt (Basalt with Secondary Mineral Infillings) — igneous

Amygdaloidal Basalt

Basalt with Secondary Mineral Infillings