Rock Identifier

Category

Mineral (Sedimentary Context)

Browse mineral (sedimentary context) specimens identified by the Rock Identifier community.

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

Quartz Druze (Crystalline Quartz)

Silicon Dioxide (SiO2)

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

Green Fluorite

Fluorite (Calcium Fluoride) - CaF2

mineral
Clear/White Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear/White Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

mineral
Cinnabar in Matrix (Cinnabar (Mercury(II) sulfide, HgS)) — mineral

Cinnabar in Matrix

Cinnabar (Mercury(II) sulfide, HgS)

mineral
Sandstone (with potential Arkose/Lithic characteristics) (Arenite (Sedimentary rock composed of sand-sized grains)) — sedimentary

Sandstone (with potential Arkose/Lithic characteristics)

Arenite (Sedimentary rock composed of sand-sized grains)

sedimentary
Red Jasper (Quartz (Silicon Dioxide) with Hematite inclusions, SiO2) — mineral

Red Jasper

Quartz (Silicon Dioxide) with Hematite inclusions, SiO2

mineral
Gneiss (Granitic Gneiss) (Gneiss (from German Gneis, related to 'spark')) — metamorphic

Gneiss (Granitic Gneiss)

Gneiss (from German Gneis, related to 'spark')

metamorphic
Chert / Flint (Silicon Dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon Dioxide (SiO2)

sedimentary
Garnet (Almandine) (Almandine, Fe3Al2(SiO4)3) — metamorphic

Garnet (Almandine)

Almandine, Fe3Al2(SiO4)3

metamorphic
Mica-rich Schist fragment (Mica Schist) — metamorphic

Mica-rich Schist fragment

Mica Schist

metamorphic
Quartz (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz

Quartz (SiO₂ - Silicon Dioxide)

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

Sandstone (Pebble)

Arenite (composed primarily of SiO2)

sedimentary
Sandstone (with Iron Staining) (Clastic sedimentary rock (primarily Quartz - SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic sedimentary rock (primarily Quartz - SiO2)

sedimentary
Sandstone (with Lichen) (Arenite (primarily SiO2)) — sedimentary

Sandstone (with Lichen)

Arenite (primarily SiO2)

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

Sandstone

Clastic sedimentary rock (primarily SiO2)

sedimentary
Clear Quartz (Silicon Dioxide (SiO2) / Rock Crystal) — mineral

Clear Quartz

Silicon Dioxide (SiO2) / Rock Crystal

mineral
Sandstone (likely Arkosic) (Clastic Sedimentary Rock (Sandstone)) — sedimentary

Sandstone (likely Arkosic)

Clastic Sedimentary Rock (Sandstone)

sedimentary
Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

sedimentary
Quartz (Microcrystalline variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline variety)

Silicon Dioxide (SiO2)

mineral
Quartz (Milky or Citrine-tinted) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Citrine-tinted)

Silicon Dioxide (SiO2)

mineral
Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

mineral
Petrified Wood (Silicon Dioxide (SiO2) - Calcified / Silicified Wood) — sedimentary

Petrified Wood

Silicon Dioxide (SiO2) - Calcified / Silicified Wood

sedimentary
Jasper (likely Polychrome or Ocean Jasper) (Silicon Dioxide (SiO2) with impurities) — sedimentary

Jasper (likely Polychrome or Ocean Jasper)

Silicon Dioxide (SiO2) with impurities

sedimentary
Leopardskin Jasper (Jasper (a variety of microcrystalline Quartz)) — Sedimentary

Leopardskin Jasper

Jasper (a variety of microcrystalline Quartz)

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

Sandstone (Quartzite-rich Pebble)

Arenite (primarily SiO2)

sedimentary
Banded Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Banded Chert

Microcrystalline Quartz (SiO2)

sedimentary
Carnelian (Red Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Red Chalcedony)

Silicon Dioxide (SiO2)

mineral
Chalcedony (Agate/Quartz variety) (Cryptocrystalline Quartz (SiO2)) — mineral

Chalcedony (Agate/Quartz variety)

Cryptocrystalline Quartz (SiO2)

mineral
Carnelian (Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Chalcedony)

Silicon Dioxide (SiO2)

mineral
Clear Quartz Crystal Cluster (Silicon Dioxide (SiO2)) — mineral

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

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

Quartz (Milky/Clear Quartz)

Silicon Dioxide (SiO2)

mineral
Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

mineral
Honey Calcite (Calcite (Calcium Carbonate, CaCO3)) — mineral

Honey Calcite

Calcite (Calcium Carbonate, CaCO3)

mineral
White Agate (resembling Bone Chalcedony) (Cryptocrystalline Quartz (SiO2)) — mineral

White Agate (resembling Bone Chalcedony)

Cryptocrystalline Quartz (SiO2)

mineral
Chalcedony (Carnelian/Agate variety) (Silicon Dioxide (SiO2) with trace hematite/iron impurities) — mineral

Chalcedony (Carnelian/Agate variety)

Silicon Dioxide (SiO2) with trace hematite/iron impurities

mineral
Optical Calcite (Iceland Spar) (Calcite (Calcium Carbonate, CaCO3)) — mineral

Optical Calcite (Iceland Spar)

Calcite (Calcium Carbonate, CaCO3)

mineral
Chalcedony (Agate/Carnelian variant) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Carnelian variant)

Silicon Dioxide (SiO2)

mineral
Aragonite Star Cluster (Aragonite (Sputnik habit) - CaesarCO3) — mineral

Aragonite Star Cluster

Aragonite (Sputnik habit) - CaesarCO3

mineral
Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

mineral
Barite (Barium Sulfate (BaSO4)) — mineral

Barite

Barium Sulfate (BaSO4)

mineral
Quartz (Clear Quartz/Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

mineral