Rock Identifier

Category

Mineral_rock

Browse mineral_rock specimens identified by the Rock Identifier community.

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

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

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Ironstone Concretion (Siderite or Limonite Concretion) — sedimentary

Ironstone Concretion

Siderite or Limonite Concretion

Sandstone with Iron Oxide (Arenite (SiO2 with Fe2O3 staining)) — sedimentary

Sandstone with Iron Oxide

Arenite (SiO2 with Fe2O3 staining)

Sandstone (Quartz-rich) (Sandstone (SiO2 dominated)) — sedimentary

Sandstone (Quartz-rich)

Sandstone (SiO2 dominated)

Sandstone (Ferruginous) (Arenite (Fe-rich SiO2)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe-rich SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Sandstone (Quartz-rich)

Arenite (SiO2 based)

Travertine (Travertine (CaCO3 - Calcium Carbonate)) — sedimentary

Travertine

Travertine (CaCO3 - Calcium Carbonate)

Sandstone Pebble (Arenite (primarily SiO2)) — sedimentary

Sandstone Pebble

Arenite (primarily SiO2)

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

Sandstone

Arenite (composed primarily of SiO2)

Sandstone (with ripple marks) (Arenite / Quartz Sandstone) — sedimentary

Sandstone (with ripple marks)

Arenite / Quartz Sandstone

Common Opal in Host Rock (Hydrated Silica (SiO2·nH2O)) — mineraloid

Common Opal in Host Rock

Hydrated Silica (SiO2·nH2O)

Quartz (Riverstone / Cobble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Riverstone / Cobble)

Silicon Dioxide (SiO2)

River Siltstone Pebble (Siltstone (primarily composed of silica and clay minerals)) — sedimentary

River Siltstone Pebble

Siltstone (primarily composed of silica and clay minerals)

Shale (with Iron Oxide staining) (Fissile Mudstone (primarily Quartz and Clay minerals)) — sedimentary

Shale (with Iron Oxide staining)

Fissile Mudstone (primarily Quartz and Clay minerals)

Sandstone (Clastic Sedimentary Rock (composed of SiO2 grains)) — sedimentary

Sandstone

Clastic Sedimentary Rock (composed of SiO2 grains)

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

Granite

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

Tiger's Eye (Silicon Dioxide (SiO2) with Limonite/Goethite pseudomorphs after Crocidolite) — Mineral

Tiger's Eye

Silicon Dioxide (SiO2) with Limonite/Goethite pseudomorphs after Crocidolite

Vesicular Basalt (Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 (Pyroxene) and (Ca,Na)Al(Al,Si)Si2O8 (Plagioclase Feldspar)) — igneous

Vesicular Basalt

Extrusive mafic igneous rock; primarily (Ca,Na)(Mg,Fe,Al,Si)2O6 (Pyroxene) and (Ca,Na)Al(Al,Si)Si2O8 (Plagioclase Feldspar)

Amethyst Geode (Amethyst (Silicon Dioxide, SiO2)) — mineral

Amethyst Geode

Amethyst (Silicon Dioxide, SiO2)

Amethyst (Faceted) (Amethyst (Silicon Dioxide with iron impurities, SiO2)) — mineral

Amethyst (Faceted)

Amethyst (Silicon Dioxide with iron impurities, SiO2)

Red Jasper (Silicon Dioxide (SiO2) with impure Iron oxides) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with impure Iron oxides

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

River Stone (Quartzite/Siltstone mixture) (Silicon Dioxide (SiO2) based metamorphosed sandstone) — metamorphic or sedimentary

River Stone (Quartzite/Siltstone mixture)

Silicon Dioxide (SiO2) based metamorphosed sandstone

metamorphic or sedimentary

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

Sandstone

Arenite (composed primarily of SiO2)

Quartzite with Gneissic Banding (Quartzite (primarily SiO2) with mafic mineral inclusions) — metamorphic

Quartzite with Gneissic Banding

Quartzite (primarily SiO2) with mafic mineral inclusions

Picture Jasper (Silicon Dioxide (SiO2) with iron oxide and clay impurities) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and clay impurities

Sandstone (likely Arkosic or Lithic Sandstone) (Clastic Sedimentary Rock (SiO2 with assorted minerals)) — sedimentary

Sandstone (likely Arkosic or Lithic Sandstone)

Clastic Sedimentary Rock (SiO2 with assorted minerals)

Amazonite (Microcline (KAlSi3O8) with lead impurities) — mineral

Amazonite

Microcline (KAlSi3O8) with lead impurities

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Peridot (Olivine ((Mg, Fe)2SiO4)) — mineral

Peridot

Olivine ((Mg, Fe)2SiO4)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Carnelian (Orange Chalcedony) (Silicon dioxide (SiO2)) — mineral

Carnelian (Orange Chalcedony)

Silicon dioxide (SiO2)

Ocean Jasper (Silicon Dioxide (SiO2) - Orbicular Jasper / Chalcedony) — mineral

Ocean Jasper

Silicon Dioxide (SiO2) - Orbicular Jasper / Chalcedony

Biotite Mica (K(Mg, Fe)3AlSi3O10(F, OH)2) — mineral

Biotite Mica

K(Mg, Fe)3AlSi3O10(F, OH)2

Rose Quartz (Quartz (SiO2) with trace amounts of Titanium, Iron, or Manganese) — mineral

Rose Quartz

Quartz (SiO2) with trace amounts of Titanium, Iron, or Manganese

Quartz with Iron Staining (Silicon Dioxide (SiO2) with Hematite/Limonite inclusions) — mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Hematite/Limonite inclusions

Banded Agate (Yellow Agate) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (Yellow Agate)

Silicon Dioxide (SiO2)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)